Section A:

Concussion Recognition, Initial Medical Assessment, Management

Introduction

Concussion is a condition that exists along a clinic-pathological spectrum of traumatic brain injury (TBI) and can result in non-specific physical, cognitive, sleep, and emotional symptoms. To provide a comprehensive medical assessment in a patient with acute head and neck trauma, a more severe form of TBI, cervical spine injury, medical conditions, mental health conditions, and neurological conditions that can present with non-specific neurological symptoms including red flags must be ruled out. This requires a comprehensive clinical history, a comprehensive physical examination, ordering and interpreting necessary diagnostic tests, and initiating referrals to medical specialists and healthcare professionals as needed. Patients diagnosed with a concussion must be provided with education and guidance on how to manage their symptoms and how to make a safe and gradual return to school/activity/sport.

The majority of children and adolescents with an acute concussion will make a complete recovery within 1-4 weeks. Those with prolonged symptoms (symptoms that last more than 4 weeks following the acute injury) can benefit from a referral to interdisciplinary teams and experienced healthcare professionals who are optimally trained to evaluate and treat the heterogeneous causes of these symptoms. For those at risk of a prolonged recovery, specialized interdisciplinary concussion care is ideally initiated within the first two weeks post-injury. When providing medical clearance to return to activities with a risk of future concussion, patients should be managed on an individualized basis. Interdisciplinary concussion teams may be recommended to manage recovery in situations in which patients have prolonged symptoms, complex medical histories, repeated concussions, or pre-injury conditions or diagnoses.

Medical and healthcare professionals should work together with patients, their families, and those involved in their lives (teachers, coaches, employers, friends, etc.) using a team and family-centred approach to best manage the needs of the patient after a concussion and promote positive health outcomes. Proper concussion recognition in children and adolescents requires all involved in a child’s life to be educated on the signs and symptoms of this condition and to collaborate to ensure that youth with suspected concussion are immediately removed from play or activity and directed to the most appropriate care. The following sections provide recommendations specific to concussion recognition, initial medical assessment, and management.

Guideline Tools:

 

icon imgDomain 1: Concussion Recognition and Directing to Care

Introduction:

All school and sport stakeholders including students, athletes, parents, teachers, coaches, officials, and healthcare professionals play an important role in recognizing suspected concussions and supporting the child when returning to school, sport, work, and other activities.

Tool 1.1: Pediatric Concussion – The Role of School Boards Community Sports Organizations and Community Centres

Tool 1.2: Concussion Recognition Tool 6 (CRT6) (Updated Sept 2023)

Tool 1.3: Manage Acute and Prolonged Symptoms Algorithm

Sport Concussion Assessment Tool 6 (SCAT6 13+yrs and Child SCAT6 8-12yrs) (Updated Sept 2023)

Recommendations

LEVEL OF EVIDENCE A = Consistent, good-quality, patient-oriented evidence (example: at least one large randomized control trial, meta-analysis or systematic review with homogeneity, or large, high- quality, multi-centre cohort study)B = Inconsistent or limited-quality patient-oriented evidence (example: smaller cohort studies, case studies or control trials with limitations)C = Consensus, usual practice, opinion or weaker-level evidence

1.1a

School boards, sports organizations, and community centres should provide pre-season concussion education and conduct a review of all concussion policies in effect within the school or sport setting.

Level of Evidence:  

1.1b

School boards, sports organizations, and community centres should ensure updated policies are in place to recognize and accommodate a child/adolescent who has sustained a concussion.

Level of Evidence:  

Tool 1.1: Pediatric Concussion- The Role of School Boards, Community Sports Organizations, and Community Centres

1.2

Remove the child/adolescent from the activity immediately if a concussion is suspected to avoid further injury and have the child/adolescent assessed. 

Level of Evidence:   

Do not leave the child alone and contact the parent/caregiver immediately. Do not let the child/adolescent return to sport (practice or game play) or other physical activities that day. “If in doubt, sit them out.”

A concussion should be suspected:

  • In any child/adolescent who sustains a significant impact to the head, face, neck, or body and demonstrates/exhibits any of the visual signs of a suspected concussion or reports any symptoms of a suspected concussion as detailed in the Concussion Recognition Tool 6 (Tool 1.2). 

Premature return to activities and sport can lead to another injury. Another blow to the head may complicate the injury further and result in a longer recovery time (i.e, higher risk of persisting symptoms). Severe brain swelling or cerebral edema after a concussion is very rare but potentially fatal.

Suggested concussion tools to share with teachers, coaches, parents, peers, and others

1.3

Recommend an emergency medical assessment for a child/adolescent with any of the “red flag” symptoms. 

Level of Evidence:   

If a child/adolescent demonstrates any of the ‘Red Flags’ symptoms indicated by the Concussion Recognition Tool 6, a more severe head or spine injury should be suspected and an emergency medical assessment is required. These red flag symptoms may appear immediately or within a few hours or days after injury. Delayed red flag symptoms require urgent medical assessment as they may indicate a more severe injury. Consider arranging an ambulance service as necessary to facilitate urgent medical assessment at the nearest hospital and execution of the Emergency Action Plan for your organization. When calling an ambulance, describe the specific red flags symptoms over the phone. 

Red flag symptoms include:

  • Severe or increasing headache 
  • Neck pain or tenderness
  • Double vision or loss of vision
  • Weakness or numbness/tingling in extremities
  • Seizure or convulsions
  • Loss of consciousness
  • Increased confusion or deteriorating conscious state
  • Repeated vomiting
  • Increasingly restless, agitated or combative state
  • Slurred speech 
  • Visible skill deformity

Suggested tools to help identify “Red Flag” symptoms

1.4 

Concussion should be suspected and diagnosed as soon as possible to maintain health and improve outcomes. Concussion can be suspected in the community by healthcare professionals, parents, teachers, coaches, and peers. Those with a suspected concussion should be assessed by a physician or nurse practitioner to perform a thorough medical assessment to exclude more severe injuries, consider a full differential diagnosis, and confirm the diagnosis of concussion. 

It is important to note that some patients may experience a delayed onset of concussion symptoms. Delayed concussion symptoms also require medical assessment to exclude more severe injuries.

Level of Evidence:   

Tool 1.3: Manage Acute and Prolonged Concussion Symptoms Algorithm

Suggested tool for the general community to suspect a concussion

Suggested tools for experienced healthcare professionals to suspect a concussion:

Tools and Resources
Living Guideline Tools
Links to Toolkits and Online Resources for School Concussion Policies:
Concussion Recognition and Directing to Care Online Tools to Consider:
References

Updated Living Guideline Evidence Map (stratified by Domain)

Previous reference list:

Amit, Perlin, and Kroshus Emily. 2020. “Content Analysis of Concussion Education for Coaches of Youth and High School Sport.” Brain Injury 34 (7): 905–13. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=medl&NEWS=N&AN=32362145.

Charek Daniel, R J Elbin, Sufrinko Alicia, Schatz Philip, D’Amico Nathan R, Collins Michael W, and Kontos Anthony P. 2020. “Preliminary Evidence of a Dose-Response for Continuing to Play on Recovery Time After Concussion.” The Journal of Head Trauma Rehabilitation 35 (2): 85–91. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=medl&NEWS=N&AN=31033740.

Bara, Alsalaheen, Almeida Andrea, Eckner James, Freeman Jeremiah, Ichesco Ingrid, Popovich Michael, Streicher Nicholas, and Lorincz Matthew. 2021. “Do Male and Female Adolescents Report Symptoms Differently after Concussion?” Brain Injury 35 (6): 698–704. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=medl&NEWS=N&AN=33689531.

Clark, Ricketta, Ansley Grimes Stanfill, Clark Ricketta, and Stanfill Ansley Grimes. 2019. “A Systematic Review of Barriers and Facilitators for Concussion Reporting Behavior among Student Athletes.” Journal of Trauma Nursing 26 (6): 297–311. https://doi.org/10.1097/JTN.0000000000000468.

Donnell, Zoe, Rosanne Hoffman, Kelly Sarmiento, and Cameron Hays. 2018. “Concussion Attitudes, Behaviors, and Education among Youth Ages 12–17: Results from the 2014 YouthStyles Survey.” Journal of Safety Research 64: 163–69. https://doi.org/10.1016/j.jsr.2017.12.001.

Fremont, Pierre, Kathryn Schneider, Anne Laroche, Carolyn Emery, and Keith Yeates. 2020. “Could a Massive Open Online Course Be Part of the Solution to Sport-Related Concussion? Participation and Impact among 8368 Registrants.” BMJ Open Sport and Exercise Medicine 6 (1): 1–7. https://doi.org/10.1136/bmjsem-2019-000700.

Howell, David R., Michael J. OʼBrien, Joana Fraser, and William P. Meehan. 2018. “Continuing Play, Symptom Severity, and Symptom Duration After Concussion in Youth Athletes.” Clinical Journal of Sport Medicine 0 (0): 1. https://doi.org/10.1097/jsm.0000000000000570.

Jill, Daugherty, DePadilla Lara, and Sarmiento Kelly. 2020. “Assessment of HEADS UP Online Training as an Educational Intervention for Sports Officials/Athletic Trainers.” Journal of Safety Research 74: 133–41. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=prem6&NEWS=N&AN=32951774.

Haarbauer-Krupa Juliet, Register-Mihalik Johna K, Nedimyer Aliza K, Chandran Avinash, Kay Melissa C, Gildner Paula, and Kerr Zachary Y. 2021. “Factors Associated with Concussion Symptom Knowledge and Attitudes towards Concussion Care-Seeking among Parents of Children Aged 5-10years.” Journal of Safety Research 78: 203–9. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=prem&NEWS=N&AN=34399916.

Kelly, Sarmiento, Daugherty Jill, and DePadilla Lara. 2019. “Youth and High School Sports Coaches’ Experience with and Attitudes about Concussion and Access to Athletic Trainers by Sport Type and Age of Athlete Coached.” Journal of Safety Research 69: 217–25. https://doi.org/10.1016/j.jsr.2019.01.005.

Kelly, Sarmiento, Donnell Zoe, Bell Elizabeth, Tennant Bethany, and Hoffman Rosanne. 2019. “A Qualitative Study of Barriers and Opportunities for Concussion Communication and Management among Parents of Youth Sports Athletes.” Journal of Concussion 3: 205970021986186–205970021986186. https://doi.org/10.1177/2059700219861863.

Weber Michelle, Welch Bacon, E Cailee, and McLeod Tamara Valovich. 2019. “School Nurses’ Management and Collaborative Practices for Student-Athletes Following Sport-Related Concussion.” The Journal of School Nursing : The Official Publication of the National Association of School Nurses 35 (5): 378–87.

Lara, DePadilla PhD, Miller PhD Gabrielle F, Everett Jones PhD, MPH, JD, and Sherry. 2020. “Characteristics of Schools with Youth Sports Concussion-Related Educational Policies and Practices.” Journal of School Health 90 (7): 520–26. https://doi.org/10.1111/josh.12900.

Lara, DePadilla PhD, Miller PhD Gabrielle F, Everett Jones PhD, MPH, JD, Sherry, Lara DePadilla PhD, Gabrielle F. Miller PhD, and Sherry Everett Jones PhD, MPH, JD. 2020. “Characteristics of Schools with Youth Sports Concussion-Related Educational Policies and Practices.” Journal of School Health 90 (7): 520–26. https://doi.org/10.1111/josh.12900.

Linder, Susan M., Jason Cruickshank, Nicole M. Zimmerman, Richard Figler, and Jay L. Alberts. 2019. “A Technology-Enabled Electronic Incident Report to Document and Facilitate Management of Sport Concussion: A Cohort Study of Youth and Young Adults.” Medicine 98 (14): e14948. https://doi.org/10.1097/MD.0000000000014948.

M, Black Amanda, Yeates Keith Owen, Babul Shelina, Nettel-Aguirre Alberto, and Emery Carolyn A. 2020. “Association between Concussion Education and Concussion Knowledge, Beliefs and Behaviours among Youth Ice Hockey Parents and Coaches: A Cross-Sectional Study.” BMJ Open 10 (8): e038166. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=prem&NEWS=N&AN=32830117.

Matveev, Roman, Lauren Sergio, Jessica Fraser-Thomas, and Alison K. Macpherson. 2018. “Trends in Concussions at Ontario Schools Prior to and Subsequent to the Introduction of a Concussion Policy – An Analysis of the Canadian Hospitals Injury Reporting and Prevention Program from 2009 to 2016.” BMC Public Health 18 (1): 1–10. https://doi.org/10.1186/s12889-018-6232-9.

McCart, Melissa, Ann E. Glang, Jody Slocumb, Jeff Gau, Laura Beck, and Doug Gomez. 2019. “A Quasi-Experimental Study Examining the Effects of Online Traumatic Brain Injury Professional Development on Educator Knowledge, Application, and Efficacy in a Practitioner Setting.” Disability and Rehabilitation 0 (0): 1–7. https://doi.org/10.1080/09638288.2019.1578423.

McGuine, Timothy A., Adam Y. Pfaller, Eric G. Post, Scott J. Hetzel, Alison Brooks, and Steven P. Broglio. 2018. “The Influence of Athletic Trainers on the Incidence and Management of Concussions in High School Athletes.” Journal of Athletic Training 53 (11): 1017–24. https://doi.org/10.4085/1062-6050-209-18.

Noelle, Yumul Joy, Crowe Louise, Catroppa Cathy, Anderson Vicki, and McKinlay Audrey. 2021. “Post-Concussive Signs and Symptoms in Preschool Children: A Systematic Review.” Neuropsychology Review. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=medp&NEWS=N&AN=34390464.

Plourde, Vickie, Janice Y. Kung, Allison Gates, Shelly Jun, Brian L. Brooks, Meghan Sebastianski, Plourde Vickie, et al. 2020. “How Perceptions Impact Recovery from Concussion in Childhood and Adolescence: A Systematic Review.” Neuropsychology Review 30 (1): 142–63. https://doi.org/10.1007/s11065-020-09430-y.

Ricketta, Clark, and Stanfill Ansley Grimes. 2019. “A Systematic Review of Barriers and Facilitators for Concussion Reporting Behavior among Student Athletes.” Journal of Trauma Nursing 26 (6): 297–311. https://doi.org/10.1097/JTN.0000000000000468.

Robyn, Feiss, Lutz Molly, Reiche Elaine, Moody Justin, and Pangelinan Melissa. 2020. “A Systematic Review of the Effectiveness of Concussion Education Programs for Coaches and Parents of Youth Athletes.” International Journal of Environmental Research and Public Health 17 (8). https://doi.org/10.3390/ijerph17082665.

Robyn, Feiss, Lutz Molly, Reiche Elaine, Moody Justin, Pangelinan Melissa, Robyn Feiss, Molly Lutz, Elaine Reiche, Justin Moody, and Melissa Pangelinan. 2020. “A Systematic Review of the Effectiveness of Concussion Education Programs for Coaches and Parents of Youth Athletes.” International Journal of Environmental Research and Public Health 17 (8): 2665. https://doi.org/10.3390/ijerph17082665.

Ruikang, Liu, and Hicks Steven D. 2021. “Discrepancies in Child and Parent Reporting of Concussion Symptoms.” Brain Injury, 1–7. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=reference&D=medp&NEWS=N&AN=33646888.

Shendell, Derek G., Lauren Gonzalez, Tracy A. Listwan, Joseph Pancella, Mary Blackborow, and Joanna Boyd. 2019. “Developing and Piloting a School-Based Online Adolescent Student-Athlete Concussion Surveillance System.” Journal of School Health 89 (7): 527–35. https://doi.org/10.1111/josh.12775.

Sungwon, Kim, and Connaughton Daniel P. 2021. “Youth Soccer Parents’ Attitudes and Perceptions About Concussions.” Journal of Adolescent Health 68 (1): 184–90. https://doi.org/10.1016/j.jadohealth.2020.04.029.

Vickie, Plourde, Kung Janice Y, Gates Allison, Jun Shelly, Brooks Brian L, and Sebastianski Meghan. 2020. “How Perceptions Impact Recovery from Concussion in Childhood and Adolescence: A Systematic Review.” Neuropsychology Review 30 (1): 142–63. https://doi.org/10.1007/s11065-020-09430-y.

Zynda, Aaron J, Meagan J Sabatino, Henry B Ellis, and Shane M Miller. 2020. “Continued Play Following Sport-Related Concussion in United States Youth Soccer.” International Journal of Exercise Science 13 (6): 87–100. http://www.intjexersci.com.

Boutis, K., Weerdenburg, K., Koo, E., Schneeweiss, S., & Zemek, R. (2015). The diagnosis of concussion in a pediatric emergency department. Journal of Pediatrics, 166(5), 1214–1220.e1. https://doi.org/10.1016/j.jpeds.2015.02.013

Bramley, H., McFarland, C., Lewis, M. M., Shaffer, M. L., Cilley, R., Engbrecht, B., … Dias, M. S. (2014). Short-term outcomes of sport- and recreation-related concussion in patients admitted to a pediatric trauma service. Clinical Pediatrics, 53(8), 784–790. https://doi.org/10.1177/0009922814533403

Elbin, R. J., Sufrinko, A., Schatz, P., French, J., Henry, L., Burkhart, S., … Kontos, A. P. (2016). Removal From Play After Concussion and Recovery Time. Pediatrics, 138(3), e20160910–e20160910. https://doi.org/10.1542/peds.2016-0910

Mckinlay, A., Ligteringen, V., & Than, M. (2014). A comparison of concussive symptoms reported by parents for preschool versus school-aged children. Journal of Head Trauma Rehabilitation, 29(3), 233–238. https://doi.org/10.1097/HTR.0b013e3182a2dd7f

Taubman, B., Rosen, F., McHugh, J., Grady, M. F., & Elci, O. U. (2016). The Timing of Cognitive and Physical Rest and Recovery in Concussion. Journal of Child Neurology, 31(14), 1555–1560. https://doi.org/10.1177/0883073816664835

Terwilliger, V. K., Pratson, L., Vaughan, C. G., & Gioia, G. A. (2016). Additional Post-Concussion Impact Exposure May Affect Recovery in Adolescent Athletes. Journal of Neurotrauma, 33(8), 761–765. https://doi.org/10.1089/neu.2015.4082

 

icon imgDomain 2: Initial Medical Assessment and Management

Introduction:

A thorough medical assessment by a physician or nurse practitioner should be performed on all children and adolescents with a suspected concussion. This assessment includes a full differential diagnosis (ruling out: a more severe TBI, cervical spine injury, medical conditions, mental health conditions, and neurological conditions that can present with non-specific neurological symptoms including red flags) and a confirmation of the diagnosis of concussion. If a more severe injury or other conditions identified at initial assessment are suspected, emergent referrals should be made to appropriate healthcare professionals. Acute signs and symptoms should be considered in context with the child/adolescent’s normal pre-injury performance, especially for those with learning and communication deficits, ADHD, and/or physical disabilities.

At the initial assessment, verbal and written information should be shared regarding the course of recovery and about when the child/adolescent can return-to-school/activity/sport and work. Patients and their parents and/or caregivers need to know that most patients recover fully from concussion even though the recovery rate is variable and unpredictable. Providing information reduces anxiety, helps set realistic expectations, promotes recovery, and prevents re-injury.

Some children/adolescents will continue to have symptoms at one month and beyond. In these situations, the healthcare professional should refer the patient to an interdisciplinary concussion team for individualized care that targets specific prolonged symptoms. Findings from the patient’s clinical history and initial assessment can identify patients who may have an elevated risk of experiencing prolonged symptoms following concussion. Identifying patients at risk for delayed recovery in the acute stage allows for early supportive care, close monitoring for prolonged or persisting symptoms, and an opportunity to consider early referral to an interdisciplinary concussion team. For those at risk of a prolonged or persistent recovery, specialized interdisciplinary concussion care is ideally initiated within the first two weeks post-injury.

Rest beyond the first 24-48 hours after a concussion is not recommended and may cause more harm than good. Return to physical and cognitive activity should be gradual and individualized based on activity tolerance and symptom presentation (e.g., the patient is able to engage in an activity while tolerating a mild increase in symptoms). Complete absence from the school environment for more than one week is generally not recommended. The child/adolescent should gradually return to their school environment (with academic accommodations) as soon as they are able to tolerate engaging in cognitive activities, even if they are still experiencing symptoms Full-contact sport or high-risk activities where there is a risk for repeat concussion should be avoided until 1) post-concussion symptoms have subsided during both rest of physical exertion, 2) the child/adolescent has returned to full school activities without accommodations related to post-concussion symptoms, and 3) child/adolescent has medical clearance to return to full-contact sport and high-risk activities following the completion of a return-to-sport protocol.

Upon discharge from the initial assessment from the Emergency Department or Primary Care Provider (physician or nurse practitioner), families should be provided with written instructions that include red flags to return for urgent re-assessment. Families should be informed that most patients recover fully from concussion even though the recovery rate is variable; this will help set realistic expectations, promote recovery and prevent re-injury.

Recommendations

LEVEL OF EVIDENCE A = Consistent, good-quality, patient-oriented evidence (example: at least one large randomized control trial, meta-analysis or systematic review with homogeneity, or large, high- quality, multi-centre cohort study)B = Inconsistent or limited-quality patient-oriented evidence (example: smaller cohort studies, case studies or control trials with limitations)C = Consensus, usual practice, opinion or weaker-level evidence

2.1

Physicians or nurse practitioners should perform a comprehensive medical assessment on all children/adolescents with a suspected concussion or with acute head or spine trauma.  

Include a clinical history, physical examination, and the evidence-based use of diagnostic tests or imaging as needed.

Online resources to consider:

Tool 1.3: Manage Acute and Prolonged Symptoms Algorithm

2.1a

Take a comprehensive clinical history.

Level of Evidence:

Details that should be collected in the clinical history include:

  • Patient demographics (e.g., age, sex, gender).
  • Assess injury mechanism and symptoms at the time of injury.
  • Assess symptom burden at the time of initial presentation.
    • Number of symptoms.
    • Severity of symptoms.
    • Type of symptoms.
  • Presence of loss of consciousness, post-traumatic amnesia, and red flags (seizures, neck pain, focal neurological deficits).
  • Current post-concussion symptoms (using age-appropriate standardized symptom inventory).
  • Review mental health (Domain 8: Mental Health and Psychosocial Factors).
  • Past medical history (e.g., previous concussions, migraine or non-specific headaches, mental health disorders, coagulopathy, other risk modifiers that may delay recovery). Note the duration until recovery from previous concussions (i.e., within 7-10 days or persisting).
  • Allergies/immunizations.
  • Ask whether the child/adolescent is taking any substances or medications: Prescribed or over-the-counter medications or supplements, alcohol, or recreational drugs including cannabis. These substances may mask or modify concussion symptoms.

Ask about school, activities, work, and sports participation.

2.1b

Perform a comprehensive physical examination.

Level of Evidence:  

  • Vital signs (resting heart rate and blood pressure).
  • Level of consciousness (Glasgow Coma Scale).
  • Mental status.
  • A complete neurological examination (cranial nerve, motor, sensory, reflex, cerebellar, gait, and balance testing) (Tool 2.1: Physical examination).
  • A cervical spine examination (palpation, range of motion, provocative cervical spine tests) (Tool 2.1: Physical examination).
  • An examination of the visual and vestibular systems.

Online tools to consider:

2.1c

Consider CT of the brain or cervical spine only in patients whom, after a medical assessment, a structural intracranial or cervical spine injury is suspected; do not conduct routine neuroimaging for the purpose of diagnosing concussion. 

Level of Evidence: CT. MRI.

Most children/adolescents who sustain an acute head injury or suspected concussion do not need diagnostic imaging. 

Use the following tools, as appropriate, to determine the need for CT imaging in patients with acute head trauma:

Although validated clinical decision-making rules are highly sensitive, these tools are meant to assist, but not replace, clinical judgment. CT scans should be used judiciously as the exposure of children/adolescents to the effects of ionizing radiation carries a small increased lifetime risk of cancer. If a structural brain injury is suspected in a patient with acute head trauma undergoing initial medical assessment in the office setting, urgent referral to an Emergency Department should be arranged.

Diagnostic imaging of the spine should be considered when symptoms are suggestive of structural cervical spine injury. Imaging should be considered in patients with severe neck pain, tenderness or clinical evidence of radiculopathy or myelopathy. The choice of imaging modality (plain radiographs, CT or MRI of the cervical spine) should be guided by the suspected pathology.

Patients with positive traumatic findings observed on diagnostic imaging of the brain or spine should be urgently referred to a neurosurgeon for consultation.

2.2

Note common modifiers that may delay recovery and use a clinical risk score to predict risk of prolonged symptoms.

Level of Evidence:

Link: Predicting Persistent Post-Concussive Problems in Pediatrics (5P): Score Calculator.

Modifiers that may delay recovery:

  • Age (increased risk with increased age).
  • Sex (female).
  • Duration of recovery from a previous concussion.
  • High pre-injury symptom burden.
  • High symptom burden at initial presentation.
  • Clinical evidence of vestibular or oculomotor dysfunction.
  • Vestibular-Ocular Reflex (VOR) and tandem gait parameters.
  • Orthostatic intolerance.
  • Personal and family history of migraines.
  • History of learning or behavioural difficulties.
  • Personal and family history of mental health.
  • Family socioeconomic status/education.

2.2

Provide verbal information and written (electronic) handouts regarding the course of recovery and when the child/adolescent can return to school/activity/sport/work.

Level of Evidence:  

Consider the following anticipatory guidance (verbal reassurance) in order to reduce anxiety, set realistic expectations, promote recovery, and prevent re-injury: 

  • Most patients recover fully from concussion even though the recovery rate is variable and unpredictable.
  • Current symptoms are expected and common.
  • The burden and distress parents/caregivers of children/adolescents who have sustained a concussion may experience is common.
  • Children typically recover in 1-4 weeks but some children/adolescents will have symptoms at one month and beyond and need to be monitored/seek additional care. Females aged 13-18 years have an increased risk of prolonged recovery.
  • Tool 2.0: Living Guideline Return to Activity Sports and School Protocol (Updated Sept 2023)
  • Recommendation 2.3 Recommend graduated return to physical and cognitive activity
  • Return to school should be step-wise as soon as the student is able and include temporary academic modifications based on the student’s symptom tolerance. See Domain 12: Return-to-School and Work for more recommendations and a list of return-to-school resources.

Summary of online tools to consider related to lifestyle strategies and expectations:

2.3

Recommend graduated return to cognitive and physical activity to promote recovery.

While most children/adolescents fully recover, the recovery rate can be variable. Return to physical and cognitive activity should be individualized based on activity tolerance and symptom presentation.

2.3a

Recommend an initial 24-48 hour period of relative rest*.

Level of Evidence: A Gradual return to physical activity. B Gradual return to cognitive activity.

*Relative rest: activities of daily living including walking and other light physical and cognitive activities are permitted as tolerated. (this definition has been harmonized with and adapted from the Amsterdam International Consensus Statement on Concussion in Sport)

See Living Guideline Return to Sport/Activity and School Protocols

Updated Sept 2023

2.3b

2.3b Recommend that physical and cognitive activity be started 24-48 hours after a concussion increasing the intensity gradually as part of the initial treatment for acute concussion. Activities that pose no/low risk of sustaining a concussion should be resumed even if mild residual symptoms are present.

Start with ‘light-intensity’ aerobic exercise, progressing to ‘moderate-intensity’ aerobic exercise, and continue to increase the intensity over time as symptoms are tolerated.* Suggest taking a break from the activity if the increase in symptoms is more than mild and brief** or the symptoms cannot be tolerated. 

Level of Evidence:  A- Physical activity, B- Cognitive activity

Updated: Sept 2023

*Light-intensity aerobic exercise: Target heart rate of up to approximately 55% of the person’s maximum heart rate (estimated according to age- 220 beats/min minus age in years)

Moderate-intensity aerobic exercise: Target heart rate of up to approximately 70% of the person’s maximum heart rate

**More than mild and brief symptom exacerbation: An increase in current concussion symptoms of no more than 2 points on a 0-10 point scale for less than an hour compared to the resting value prior to the physical activity. Example of a 0-10 point Symptom severity scale: Visual Analog Scale (VAS)

(these definitions have been harmonized with and adapted from the Amsterdam International Consensus Statement on Concussion in Sport)

2.3c

Recommend that patients avoid activities associated with a risk of contact, fall, or collisions such as high-speed and/or contact activities and full-contact sport that may increase the risk of sustaining another concussion until medically cleared (see Recommendation 4.1: Consider patients for medical clearance to return to full-contact activities and sport/gameplay if clinical criteria have been met. Note: An update to Rec 4.1 was performed Sept 2023). 

Level of Evidence:  

  • Advise/emphasize that returning to full-contact sport or high-risk activities before the child/adolescent has recovered increases the risk of delayed recovery and for sustaining another more severe concussion or more serious injury.

2.3d

Refer select patients (e.g., highly-active or competitive athletes, those who are not tolerating a graduated return to physical activity, or those who are slow to recover) following acute injury to a medically supervised interdisciplinary team with the ability to individually assess aerobic exercise tolerance and to prescribe aerobic exercise treatment. This exercise tolerance assessment can be as early as 48 hours following acute injury. Level of Evidence:

Links to exertion test resources:
 
(Updated: Sept 2023)

2.3e

Patients who are active may benefit from referral to a medically supervised interdisciplinary team with the ability to individually assess aerobic exercise tolerance and to prescribe aerobic exercise treatment. This exercise tolerance assessment can be as early as 48 hours following acute injury. Level of Evidence:
Links to exertion test resources:
 
(Updated: Sept 2023)

2.4

Provide education and guidance regarding strategies to promote recovery.

2.4a

Advise on the importance of sleep and discuss sleep hygiene.

Level of Evidence:

Advise that consistent sleep schedules and duration of sleep may contribute to general recovery from a concussion and alleviate symptoms such as mood, anxiety, pain, fatigue, and cognitive difficulties if these are present. 

Summary of tools to consider:

2.4b

Advise on maintaining social networks and interactions (as tolerated). Children/adolescents should participate (modified as needed) in rewarding social activities that avoid the risk of re-injury. Social engagement may promote recovery and reduce the risk of mental health issues. 

Level of Evidence:  

Updated Sept 2023

2.4c

Screentime should be minimized in the first 48 hours after injury. After the initial period of relative rest, the use of devices with screens may be gradually resumed. The use of these devices can be increased according to symptom tolerance as the child/adolescent recovers.

Level of Evidence: B

Updated Sept 2023

2.4d

Advise on avoiding alcohol and other recreational drugs after a concussion.

Level of Evidence:

Alcohol and recreational drugs may have a negative effect on concussion recovery. Avoiding alcohol or drugs prevents a child/adolescent from self-medicating and resorting to drugs to relieve symptoms. Impaired judgment after a concussion could lead to risky behaviour that causes further harm or may delay the identification of complications.

2.4e

Advise to avoid driving during the first 24-48 hours after a concussion. Advise patients to begin driving when they are feeling improved, can concentrate sufficiently to feel safe behind the wheel, and when the act of driving does not provoke significant concussion symptoms.

Level of Evidence:

Provide verbal information related to when an adolescent should return to driving during recovery from a concussion. Driving is a complex coordinated process that requires vision, balance, reaction time, judgment, cognition, and attention. Concussion may have affected some or all of these skills. Driving impairments have been shown to exist even in asymptomatic patients 48 hours after a concussion. Avoiding driving for at least 24-48 hours after a concussion may potentially prevent motor vehicle accidents and, therefore, injury to the adolescent or to others.

2.5

Over-the-counter medications such as acetaminophen and ibuprofen may be recommended to treat acute headache. Limit the use of these short-term acting medications to the first week post-injury and avoid “around-the-clock” dosing to prevent overuse or rebound headaches.

Level of Evidence:  

Updated Sept 2023

2.6

At present, there is limited evidence to support the administration of intravenous medication to treat acute headaches in pediatric concussion patients in the Emergency Department setting.

Level of Evidence:

2.7

After assessment, nearly all children/adolescents with concussion may be safely discharged from clinics and Emergency Departments for observation at home.

Level of Evidence:  

The decision to observe in the hospital will depend on clinical judgment. Indicators for longer in-hospital observation (or to return to emergency for re-assessment) may include:

  • Worsening symptoms (headache, confusion, irritability).
  • Decreased level of consciousness.
  • Prolonged clinical symptoms (persistent/prolonged vomiting, severe headache, etc.).
  • Bleeding disorders.
  • Multi-system injuries. 
  • Co-morbid symptoms. 

Other discharge considerations:

  • Observe the child/adolescent for a period of time to verify that they do not develop “red flag” symptoms prior to discharge. Use clinical judgment.
  • Verify that the child/adolescent has a normal mental status (alertness/behaviour/cognition) and their symptoms are improving prior to discharge. 
  • Verify that an assessment of clinical risk factors indicating the need for a CT scan was performed or a normal result was obtained if a CT scan was performed prior to discharge.
  • See Recommendation 2.1c for more information on when to consider diagnostic brain or cervical spine imaging.

2.8

Recommend a medical follow-up visit in 1-2 weeks to re-assess and monitor clinical status. Recommend an immediate medical follow-up in the presence of any deterioration.

Level of Evidence:

Those with a confirmed diagnosis of concussion may be managed by a healthcare professional who within their formally designated scope of practice has the capacity to manage ongoing concussion-related symptoms.

2.9

Refer patients at elevated risk for delayed recovery to an interdisciplinary concussion team. Level of Evidence: 

See Recommendation 2.1b: Note any modifiers that may delay recovery and use a clinical risk score to predict risk of prolonged symptoms.

2.9a

Specialized interdisciplinary concussion care is ideally initiated for patients at elevated risk for a delayed recovery within the first two weeks post-injury. Level of Evidence:  

2.10

Provide post-concussion information and a written medical assessment to the child/adolescent and the parent/caregiver prior to sending the child/adolescent home. 

Level of Evidence:  

Write the discharge note/written medical assessment with the following information:

Verbal and written (or electronic) guidance should include:

Other patient information handouts to consider:

Tools and Resources
Living Guideline Tools

Online Tools and Patient Handouts to Consider:

References

Research papers that support the present guideline recommendations:

Aggarwal SS, Ott SD, Padhye NS, et al. Sex, race, ADHD, and prior concussions as predictors of concussion recovery in adolescents. Brain Inj. 2020 May 11;34(6):809–17.

Aggarwal, S. S., Ott, S. D., Padhye, N. S., Meininger, J. C., & Armstrong, T. S. (2019). Clinical and demographic predictors of concussion resolution in adolescents: A retrospective study. Applied Neuropsychology: Child, 8(1), 50–60. https://doi.org/10.1080/21622965.2017.1381099

Anderson V, Davis GA, Takagi M, et al. Trajectories and Predictors of Clinician-Determined Recovery after Child Concussion. J Neurotrauma. 2020 Jun 15;37(12):1392–400.

Argyropoulou MI, Alexiou GA, Xydis VG, et al. Pediatric minor head injury imaging practices: results from an ESPR survey. Neuroradiology. 2020 Feb 1;62(2):251–5.

Beauchamp, M. H., Aglipay, M., Yeates, K. O., Désiré, N., Keightley, M., Anderson, P., … Moore, J. (2018). Predictors of neuropsychological outcome after pediatric concussion. Neuropsychology, 32(4), 495–508. https://doi.org/10.1037/neu0000419

Billeck J, Peeler J. The influence of fatiguing exercise on Sport Concussion Assessment Tool (SCAT) scoring in a female pediatric population. Phys Sportsmed [Internet]. 2020 Oct 1;48(4):458–62. Available from: https://doi.org/10.1080/00913847.2020.1746979

Borland ML, Dalziel SR, Phillips N, et al. Delayed Presentations to Emergency Departments of Children With Head Injury: A PREDICT Study. Ann Emerg Med [Internet]. 2019 Jul 1;74(1):1–10. Available from: https://linkinghub.elsevier.com/retrieve/pii/S0196064418314859

Boutis, K., Gravel, J., Freedman, S. B., Craig, W., Tang, K., DeMatteo, C. A., … Zemek, R. (2018). The Diagnosis of Concussion in Pediatric Emergency Departments: A Prospective Multicenter Study. Journal of Emergency Medicine, 54(6), 757–765. https://doi.org/10.1016/j.jemermed.2018.02.041

Boutis, K., Weerdenburg, K., Koo, E., Schneeweiss, S., & Zemek, R. (2015). The diagnosis of concussion in a pediatric emergency department. Journal of Pediatrics, 166(5), 1214–1220.e1. https://doi.org/10.1016/j.jpeds.2015.02.013

Bozan Ö, Aksel G, Kahraman HA, et al. Comparison of PECARN and CATCH clinical decision rules in children with minor blunt head trauma. Eur J Trauma Emerg Surg [Internet]. 2019 Oct 25;45(5):849–55. Available from: http://link.springer.com/10.1007/s00068-017-0865-8

Bramley, H., McFarland, C., Lewis, M. M., Shaffer, M. L., Cilley, R., Engbrecht, B., … Dias, M. S. (2014). Short-term outcomes of sport- and recreation-related concussion in patients admitted to a pediatric trauma service. Clinical Pediatrics, 53(8), 784–790. https://doi.org/10.1177/0009922814533403

Bressan S, Clarke CJ, Anderson V, et al. Use of the sport concussion assessment tools in the emergency department to predict persistent post-concussive symptoms in children. J Paediatr Child Health [Internet]. 2020 Aug 21;56(8):1249–56. Available from: https://onlinelibrary.wiley.com/doi/10.1111/jpc.14910

Brooks, T. M., Smith, M. M., Silvis, R. M., Lerer, T., Mulvey, C. H., Maitland, R., … Smith, S. R. (2017). Symptom-Guided Emergency Department Discharge Instructions for Children with Concussion. Pediatric Emergency Care, 33(8), 553–563. https://doi.org/10.1097/PEC.0000000000000797

Bunt SC, Didehbani N, Tarkenton T, et al. Sex Differences and Reporting of SCAT-5 Concussion Symptoms in Adolescent Athletes. Clin J Sport Med. 2020;Publish Ah(00).

Chan, C., Iverson, G. L., Purtzki, J., Wong, K., Kwan, V., Gagnon, I., & Silverberg, N. D. (2018). Safety of Active Rehabilitation for Persistent Symptoms After Pediatric Sport-Related Concussion: A Randomized Controlled Trial. Archives of Physical Medicine and Rehabilitation, 99(2), 242–249. https://doi.org/10.1016/j.apmr.2017.09.108

Chrisman SPD, Whitlock KB, Mendoza JA, et al. Corrigendum: Pilot Randomized Controlled Trial of an Exercise Program Requiring Minimal In-person Visits for Youth With Persistent Sport-Related Concussion. Front Neurol [Internet]. 2020 Feb 21;11. Available from: https://www.frontiersin.org/article/10.3389/fneur.2020.00006/full

Cohen, E., Rodean, J., Diong, C., Hall, M., Freedman, S. B., Aronson, P. L., … Neuman, M. I. (2019). Low-Value Diagnostic Imaging Use in the Pediatric Emergency Department in the United States and Canada. JAMA Pediatrics, 173(8). https://doi.org/10.1001/jamapediatrics.2019.1439

Cohrs, G., Huhndorf, M., Niemczyk, N., Volz, L. J., Bernsmeier, A., Singhal, A., … Knerlich-Lukoschus, F. (2018). MRI in mild pediatric traumatic brain injury: Diagnostic overkill or useful tool? Child’s Nervous System, 34(7), 1345–1352. https://doi.org/10.1007/s00381-018-3771-4

Corwin DJ, Arbogast KB, Swann C, et al. Reliability of the visio-vestibular examination for concussion among providers in a pediatric emergency department. Am J Emerg Med [Internet]. 2020 Sep;38(9):1847–53. Available from: https://doi.org/10.1016/j.ajem.2020.06.020

Coslick AM, Chin KE, Kalb LG, et al. Participation in Physical Activity at Time of Presentation to a Specialty Concussion Clinic Is Associated With Shorter Time to Recovery. PM R [Internet]. 2020 Dec 3;12(12):1195–204. Available from: https://onlinelibrary.wiley.com/doi/10.1002/pmrj.12443

Davis, G. A., Purcell, L., Schneider, K. J., Yeates, K. O., Gioia, G. A., Anderson, V., … Kutcher, J. S. (2017). The Child Sport Concussion Assessment Tool 5th Edition (Child SCAT5): Background and rationale. British Journal of Sports Medicine, 51(11), 859–861. https://doi.org/10.1136/bjsports-2017-097492

DeMatteo C, Bednar ED, Randall S, et al. Effectiveness of return to activity and return to school protocols for children postconcussion: a systematic review. BMJ Open Sport Exerc Med [Internet]. 2020 Feb 24;6(1):e000667. Available from: https://bmjopensem.bmj.com/lookup/doi/10.1136/bmjsem-2019-000667

Dobney, D. M., Grilli, L., Kocilowicz, H., Beaulieu, C., Straub, M., Friedman, D., & Gagnon, I. J. (2018). Is There an Optimal Time to Initiate an Active Rehabilitation Protocol for Concussion Management in Children? A Case Series. Journal of Head Trauma Rehabilitation, 33(3), E11–E17. https://doi.org/10.1097/HTR.0000000000000339

Durish, C. L., Yeates, K. O., & Brooks, B. L. (2018). Psychological Resilience as a Predictor of Persistent Post-Concussive Symptoms in Children with Single and Multiple Concussion. Journal of the International Neuropsychological Society, 24(8), 759–768. https://doi.org/10.1017/S1355617718000437

Elbin, R. J., Sufrinko, A., Schatz, P., French, J., Henry, L., Burkhart, S., … Kontos, A. P. (2016). Removal From Play After Concussion and Recovery Time. Pediatrics, 138(3), e20160910–e20160910. https://doi.org/10.1542/peds.2016-0910

Ellis, M. J., McDonald, P. J., Olson, A., Koenig, J., & Russell, K. (2019). Cervical Spine Dysfunction Following Pediatric Sports-Related Head Trauma. Journal of Head Trauma Rehabilitation, 34(2), 103–110. https://doi.org/10.1097/HTR.0000000000000411

Ellis, M., Krisko, C., Selci, E., & Russell, K. (2018). Effect of concussion history on symptom burden and recovery following pediatric sports-related concussion. Journal of Neurosurgery: Pediatrics, 21(4), 401–408. https://doi.org/10.3171/2017.9.PEDS17392

Fehr, S. D., Nelson, L. D., Scharer, K. R., Traudt, E. A., Veenstra, J. M., Tarima, S. S., … Walter, K. D. (2019). Risk Factors for Prolonged Symptoms of Mild Traumatic Brain Injury: A Pediatric Sports Concussion Clinic Cohort. Clinical Journal of Sport Medicine, 29(1), 11–17. https://doi.org/10.1097/JSM.0000000000000494

Gagnon I, Teel E, Gioia G, et al. Parent-Child Agreement on Postconcussion Symptoms in the Acute Postinjury Period. Pediatrics [Internet]. 2020 Jul;146(1):e20192317. Available from: http://pediatrics.aappublications.org/lookup/doi/10.1542/peds.2019-2317

Gauvin-Lepage, J., Friedman, D., Grilli, L., Sufrategui, M., De Matteo, C., Iverson, G. L., & Gagnon, I. (2018). Effectiveness of an Exercise-Based Active Rehabilitation Intervention for Youth Who Are Slow to Recover After Concussion. Clinical Journal of Sport Medicine, 00(00), 1. https://doi.org/10.1097/jsm.0000000000000634

Gladstone E, Narad ME, Hussain F, et al. Neurocognitive and Quality of Life Improvements Associated With Aerobic Training for Individuals With Persistent Symptoms After Mild Traumatic Brain Injury: Secondary Outcome Analysis of a Pilot Randomized Clinical Trial. Front Neurol [Internet]. 2019 Sep 18;10(September):1–9. Available from: https://www.frontiersin.org/article/10.3389/fneur.2019.01002/full

Glaviano, N. R., Benson, S., Goodkin, H. P., Broshek, D. K., & Saliba, S. (2015). Baseline SCAT2 Assessment of Healthy Youth Student-Athletes: Preliminary Evidence for the Use of the Child-SCAT3 in Children Younger Than 13 Years. Clinical Journal of Sport Medicine, 25(4), 373–379. https://doi.org/10.1097/JSM.0000000000000154

Gravel J, Ledoux AA, Tang K, et al. Early versus delayed emergency department presentation following mild Traumatic Brain Injury and the presence of symptom at 1, 4 and 12 weeks in children. Emerg Med J [Internet]. 2020 Jun;37(6):338–43. Available from: https://emj.bmj.com/lookup/doi/10.1136/emermed-2019-209054

Grool, A. M., Aglipay, M., Momoli, F., Meehan, W. P., Freedman, S. B., Yeates, K. O., … Zemek, R. (2016). Association Between Early Participation in Physical Activity Following Acute Concussion and Persistent Postconcussive Symptoms in Children and Adolescents. Jama, 316(23), 2504. https://doi.org/10.1001/jama.2016.17396

Guerriero, R. M., Kuemmerle, K., Pepin, M. J., Taylor, A. M., Wolff, R., & Meehan, W. P. (2018). The Association Between Premorbid Conditions in School-Aged Children With Prolonged Concussion Recovery. Journal of Child Neurology, 33(2), 168–173. https://doi.org/10.1177/0883073817749655

Haider MN, Johnson SL, Mannix R, et al. The Buffalo Concussion Bike Test for Concussion Assessment in Adolescents. Sport Heal A Multidiscip Approach [Internet]. 2019 Nov 5;11(6):492–7. Available from: http://journals.sagepub.com/doi/10.1177/1941738119870189

Haider MN, Worts PR, Viera KB, et al. Postexercise Slowing on the King-Devick Test and Longer Recovery From Sport-Related Concussion in Adolescents: A Validation Study. J Athl Train [Internet]. 2020 May 1;55(5):482–7. Available from: https://meridian.allenpress.com/jat/article/55/5/482/436794/Postexercise-Slowing-on-the-KingDevick-Test-and

Haider, M. N., Leddy, J. J., Wilber, C. G., Viera, K. B., Bezherano, I., Wilkins, K. J., … Willer, B. S. (2019). The predictive capacity of the buffalo concussion treadmill test after sport-related concussion in adolescents. Frontiers in Neurology, 10(APR), 1–7. https://doi.org/10.3389/fneur.2019.00395

Howell, D. R., Kriz, P., Mannix, R. C., Kirchberg, T., Master, C. L., & Meehan, W. P. (2019). Concussion Symptom Profiles Among Child, Adolescent, and Young Adult Athletes. Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine, 29(5), 391–397. https://doi.org/10.1097/JSM.0000000000000629

Howell, D. R., Zemek, R., Brilliant, A. N., Mannix, R. C., Master, C. L., & Meehan, W. P. (2018). Identifying Persistent Postconcussion Symptom Risk in a Pediatric Sports Medicine Clinic. American Journal of Sports Medicine, 46(13), 3254–3261. https://doi.org/10.1177/0363546518796830

Hunt, A. W., Laupacis, D., Kawaguchi, E., Greenspoon, D., & Reed, N. (2018). Key ingredients to an active rehabilitation programme post-concussion: perspectives of youth and parents. Brain Injury, 32(12), 1534–1540. https://doi.org/10.1080/02699052.2018.1502894

Kontos AP, Jorgensen-Wagers K, Trbovich AM, et al. Association of Time Since Injury to the First Clinic Visit With Recovery Following Concussion. JAMA Neurol [Internet]. 2020 Apr 1;77(4):435. Available from: https://jamanetwork.com/journals/jamaneurology/fullarticle/2757869

Lawrence, D. W., Richards, D., Comper, P., & Hutchison, M. G. (2018). Earlier time to aerobic exercise is associated with faster recovery following acute sport concussion. PLoS ONE, 13(4), 1–12. https://doi.org/10.1371/journal.pone.0196062

Leddy, J. J., Haider, M. N., Ellis, M. J., Mannix, R., Darling, S. R., Freitas, M. S., … Willer, B. (2019). Early Subthreshold Aerobic Exercise for Sport-Related Concussion: A Randomized Clinical Trial. JAMA Pediatrics, 173(4), 319–325. https://doi.org/10.1001/jamapediatrics.2018.4397

Leddy, J. J., Haider, M. N., Hinds, A. L., Darling, S., & Willer, B. S. (2019). A Preliminary Study of the Effect of Early Aerobic Exercise Treatment for Sport-Related Concussion in Males. Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine, 29(5), 353–360. https://doi.org/10.1097/JSM.0000000000000663

Leddy, J. J., Hinds, A. L., Miecznikowski, J., Darling, S., Matuszak, J., Baker, J. G., … Willer, B. (2018). Safety and prognostic utility of provocative exercise testing in acutely concussed adolescents: A randomized trial. Clinical Journal of Sport Medicine, 28(1), 13–20. https://doi.org/10.1097/JSM.0000000000000431

Ledoux, A. A., Tang, K., Yeates, K. O., Pusic, M. V., Boutis, K., Craig, W. R., … Zemek, R. L. (2019). Natural Progression of Symptom Change and Recovery from Concussion in a Pediatric Population. JAMA Pediatrics, 173(1), 1–11. https://doi.org/10.1001/jamapediatrics.2018.3820

Lindholm EB, D’Cruz R, Fajardo R, et al. Admission of Pediatric Concussion Injury Patients: Is it Necessary? J Surg Res. 2019 Dec 1;244:107–10.

Lumba-Brown, A., Yeates, K. O., Sarmiento, K., Breiding, M. J., Haegerich, T. M., Gioia, G. A., … Timmons, S. D. (2018). Diagnosis and Management of Mild Traumatic Brain Injury in Children: A Systematic Review. JAMA Pediatrics, 172(11). https://doi.org/10.1001/jamapediatrics.2018.2847

Mannix, R., Zemek, R., Yeates, K. O., Arbogast, K., Atabaki, S., Badawy, M., … Wisniewski, S. (2019). Practice patterns in pharmacological and non-pharmacological therapies for children with mild traumatic brain injury: A survey of 15 canadian and United States centers. Journal of Neurotrauma, 36(20), 2886–2894. https://doi.org/10.1089/neu.2018.6290

Master CL, Curry AE, Pfeiffer MR, et al. Characteristics of Concussion in Elementary School-Aged Children: Implications for Clinical Management. J Pediatr [Internet]. 2020;223:128–35. Available from: https://doi.org/10.1016/j.jpeds.2020.04.001

Master, C. L., Master, S. R., Wiebe, D. J., Storey, E. P., Lockyer, J. E., Podolak, O. E., & Grady, M. F. (2018). Vision and Vestibular System Dysfunction Predicts Prolonged Concussion Recovery in Children. Clinical Journal of Sport Medicine, 28(2), 139–145. https://doi.org/10.1097/JSM.0000000000000507

McCrory, P., Meeuwisse, W., Dvořák, J., Aubry, M., Bailes, J., … Vos, P.E. (2017) Consensus statement on concussion in sport—the 5th international conference on concussion in sport held in Berlin, October 2016. British Journal of Sports Medicine. 51(11),838-847. https://doi.org/10.1136/bjsports-2017-097699

Mckinlay, A., Ligteringen, V., & Than, M. (2014). A comparison of concussive symptoms reported by parents for preschool versus school-aged children. Journal of Head Trauma Rehabilitation, 29(3), 233–238. https://doi.org/10.1097/HTR.0b013e3182a2dd7f

Miller, J. H., Gill, C., Kuhn, E. N., Rocque, B. G., Menendez, J. Y., O’Neill, J. A., … Johnston, J. M. (2016). Predictors of delayed recovery following pediatric sports-related concussion: a case-control study. Journal of Neurosurgery: Pediatrics, 17(4), 491–496. https://doi.org/10.3171/2015.8.PEDS14332

Olson A, Ellis MJ, Selci E, et al. Delayed Symptom Onset Following Pediatric Sport-Related Concussion. Front Neurol. 2020 Apr 3;11.

Orr, R., Bogg, T., Fyffe, A., Lam, L. T., & Browne, G. J. (2018). Graded Exercise Testing Predicts Recovery Trajectory of Concussion in Children and Adolescents. Clinical Journal of Sport Medicine, 00(00), 1. https://doi.org/10.1097/jsm.0000000000000683

Patsimas T, Howell DR, Potter MN, et al. Concussion-symptom rating correlation between pediatric patients and their parents. J Athl Train. 2020 Feb 7;55(10):1020–6.

Plourde, V., Yeates, K. O., & Brooks, B. L. (2018). Predictors of long-term psychosocial functioning and health-related quality of life in children and adolescents with prior concussions. Journal of the International Neuropsychological Society, 24(6), 540–548. https://doi.org/10.1017/S1355617718000061

Podolak OE, Chaudhary S, Haarbauer-Krupa J, et al. Characteristics of Diagnosed Concussions in Children Aged 0 to 4 Years Presenting to a Large Pediatric Healthcare Network. Pediatr Emerg Care [Internet]. 2020 Jun 16;Publish Ah. Available from: www.pec-online.com

Puffenbarger, M. S., Ahmad, F. A., Argent, M., Gu, H., Samson, C., Quayle, K. S., & Saito, J. M. (2019). Reduction of Computed Tomography Use for Pediatric Closed Head Injury Evaluation at a Nonpediatric Community Emergency Department. Academic Emergency Medicine, 26(7), 784–795. https://doi.org/10.1111/acem.13666

Root JM, McNamara B, Ledda M, et al. Pediatric Patient Compliance With Recommendations for Acute Concussion Management. Clin Pediatr (Phila). 2019 Jun 1;58(7):731–7.

Root JM, Sady MD, Gai J, et al. Effect of Cognitive and Physical Rest on Persistent Postconcussive Symptoms  following a Pediatric Head Injury. J Pediatr. 2020 Dec;227:184-190.e4.

Russell, K., Selci, E., Black, B., & Ellis, M. J. (2019). Health-related quality of life following adolescent sports-related concussion or fracture: A prospective cohort study. Journal of Neurosurgery: Pediatrics, 23(4), 455–464. https://doi.org/10.3171/2018.8.PEDS18356

Schilling S, Mansour A, Sullivan L, et al. Symptom burden and profiles in concussed children with and without prolonged recovery. Int J Environ Res Public Health. 2020 Jan 1;17(1).

Stumph, J., Young, J., Singichetti, B., Yi, H., Valasek, A., Bowman, E., … Fischer, A. (2019). Effect of Exercise Recommendation on Adolescents With Concussion. Journal of Child Neurology. https://doi.org/10.1177/0883073819877790

Sutton M, Chan V, Escobar M, et al. Neck injury comorbidity in concussion-related emergency department visits: A population-based study of sex differences across the life span. J Women’s Heal. 2019 Apr 1;28(4):473–82.

Taubman, B., Rosen, F., McHugh, J., Grady, M. F., & Elci, O. U. (2016). The Timing of Cognitive and Physical Rest and Recovery in Concussion. Journal of Child Neurology, 31(14), 1555–1560. https://doi.org/10.1177/0883073816664835

Terry DP, Reddi PJ, Cook NE, et al. Acute Effects of Concussion in Youth With Pre-existing Migraines. Clin J Sport Med [Internet]. 2019 Nov 26;November. Available from: http://dx.doi.org/10.1097/JSM.0000000000000791

Terwilliger, V. K., Pratson, L., Vaughan, C. G., & Gioia, G. A. (2016). Additional Post-Concussion Impact Exposure May Affect Recovery in Adolescent Athletes. Journal of Neurotrauma, 33(8), 761–765. https://doi.org/10.1089/neu.2015.4082

Willer, B. S., Haider, M. N., Bezherano, I., Wilber, C. G., Mannix, R., Kozlowski, K., & Leddy, J. J. (2019). Comparison of Rest to Aerobic Exercise and Placebo-like Treatment of Acute Sport-Related Concussion in Male and Female Adolescents. Archives of Physical Medicine and Rehabilitation, 1–9. https://doi.org/10.1016/j.apmr.2019.07.003

Yeates, K. O., Tang, K., Barrowman, N., Freedman, S. B., Gravel, J., Gagnon, I., … Zemek, R. (2019). Derivation and Initial Validation of Clinical Phenotypes of Children Presenting with Concussion Acutely in the Emergency Department: Latent Class Analysis of a Multi-Center, Prospective Cohort, Observational Study. Journal of Neurotrauma, 36(11), 1758–1767. https://doi.org/10.1089/neu.2018.6009

Zemek, R., Barrowman, N., Freedman, S. B., Gravel, J., Gagnon, I., McGahern, C., … Moore, J. (2016). Clinical risk score for persistent postconcussion symptoms among children with acute concussion in the ED. JAMA – Journal of the American Medical Association, 315(10), 1014–1025. https://doi.org/10.1001/jama.2016.1203

Zou L, Li H, Jiang Z, et al. Modified decision-making rule supported by scheduled telephone follow-up reduces head computed tomography utilization in children with mild traumatic brain injury: A cohort study. Medicine (Baltimore). 2020 May 1;99(18):e20088.

Research papers not associated with a current recommendation

Bresee, N., Aglipay, M., Dubrovsky, A. S., Ledoux, A. A., Momoli, F., Gravel, J., … Zemek, R. (2018). No association between metoclopramide treatment in ED and reduced risk of post-concussion headache. American Journal of Emergency Medicine, 36(12), 2225–2231. https://doi.org/10.1016/j.ajem.2018.04.007

Corwin, D. J., Propert, K. J., Zorc, J. J., Zonfrillo, M. R., & Wiebe, D. J. (2019). Use of the vestibular and oculomotor examination for concussion in a pediatric emergency department. American Journal of Emergency Medicine, 37(7), 1219–1223. https://doi.org/10.1016/j.ajem.2018.09.008

Gravel, J., Boutis, K., Tang, K., Beauchamp, M. H., Freedman, S. B., Dubrovsky, A. S., … Zemek, R. (2019). Association between ondansetron use and symptom persistence in children with concussions: A 5P substudy. Canadian Journal of Emergency Medicine, 21(2), 204–210. https://doi.org/10.1017/cem.2018.384

Greenberg, J. K., Yan, Y., Carpenter, C. R., Lumba-Brown, A., Keller, M. S., Pineda, J. A., … Limbrick, D. D. (2018). Development of the CIDSS2 Score for Children with Mild Head Trauma without Intracranial Injury. Journal of Neurotrauma, 35(22), 2699–2707. https://doi.org/10.1089/neu.2017.5324

Howell, D. R., Potter, M. N., Kirkwood, M. W., Wilson, P. E., Provance, A. J., & Wilson, J. C. (2019). Clinical predictors of symptom resolution for children and adolescents with sport-related concussion. Journal of Neurosurgery: Pediatrics, 24(1), 54–61. https://doi.org/10.3171/2018.11.PEDS18626

Kanani, A. N., & Hartshorn, S. (2018). Resumption of physical activity within 7 days of a concussion was associated with lower rates of persistent postconcussive symptoms (PPCS). Archives of Disease in Childhood: Education and Practice Edition, 103(2), 110. https://doi.org/10.1136/archdischild-2017-313141

Lumba-Brown, A., Teramoto, M., Bloom, O. J., Brody, D., Chesnutt, J., Clugston, J. R., … Ghajar, J. (2019). Concussion Guidelines Step 2: Evidence for Subtype Classification. Neurosurgery, 0(0), 1–12. https://doi.org/10.1093/neuros/nyz332

Lyons, T. W., Miller, K. A., Miller, A. F., & Mannix, R. (2019). Racial and ethnic differences in emergency department utilization and diagnosis for sports-related head injuries. Frontiers in Neurology, 10(JUL), 1–8. https://doi.org/10.3389/fneur.2019.00690

Murdaugh, D. L., Ono, K. E., Morris, S. O., & Burns, T. G. (2018). Effects of Developmental Age on Symptom Reporting and Neurocognitive Performance in Youth After Sports-Related Concussion Compared to Control Athletes. Journal of Child Neurology, 33(7), 474–481. https://doi.org/10.1177/0883073818766815

Oyegbile, T. O., Delasobera, B. E., & Zecavati, N. (2018). Postconcussive Symptoms After Single and Repeated Concussions in 10- to 20-Year-Olds: A Cross-Sectional Study. Journal of Child Neurology, 33(6), 383–388. https://doi.org/10.1177/0883073818759436

Takagi, M., Hearps, S. J. C., Babl, F. E., Anderson, N., Bressan, S., Clarke, C., … Anderson, V. (2019). Does a computerized neuropsychological test predict prolonged recovery in concussed children presenting to the ED? Child Neuropsychology, 00(00), 1–15. https://doi.org/10.1080/09297049.2019.1639653

Date of last update: January 4, 2021

 

icon imgDomain 3: Medical Follow-up and Management of Prolonged Symptoms

Introduction:

A medical follow-up is recommended if a child/adolescent is experiencing post-concussion symptoms, has not completed the return-to-school or return-to-activity/sport stages, or experiences any deterioration. Post-concussion symptoms and return-to-school/ activity/sport/work status should be reassessed. A medical assessment including clinical history, comprehensive physical examination, and consideration for diagnostic tests or imaging should be considered in patients with red flag symptoms or worrisome clinical findings. Those with a confirmed diagnosis of concussion may be managed by a healthcare professional that, within their formally designated scope of practice, has the capacity to manage ongoing concussion-related symptoms.

Patients who are experiencing clinical improvement in their post-concussion symptoms should continue to be provided with education, reassurance, and guidance on advancing through their return-to-school/activity/sport protocols. At follow-up visits, patients should be provided with an updated medical clearance letter indicating if they are medically cleared to participate in full-contact sport or high-risk activities.

If post-concussion symptoms have not resolved by 2-4 weeks, or if the child/adolescent’s condition/symptoms worsen, consider referral to specialized care with an interdisciplinary concussion team and ensure that the child/adolescent is well supported at school and at home. Additionally, early identification of patients with modifiers that may delay recovery allows for early targeted supportive care, close monitoring for prolonged symptoms, and consideration for early referral (before 2-4 weeks following acute injury) to an interdisciplinary concussion team.

For those at risk of a prolonged or persistent recovery, specialized interdisciplinary concussion care is ideally initiated within the first two weeks post-injury. Patients who are active, competitive athletes, and those who are not tolerating a gradual return to physical activity may benefit from early assessment of their aerobic exercise tolerance and prescribed aerobic exercise as early as 48 hours following acute injury.

Tool 1.3: Manage Acute and Prolonged Concussion Symptoms Algorithm

Living Guideline Return to Activity, Sports and School Protocols (Updated Sept 2023)

Recommendations

LEVEL OF EVIDENCE A = Consistent, good-quality, patient-oriented evidence (example: at least one large randomized control trial, meta-analysis or systematic review with homogeneity, or large, high- quality, multi-centre cohort study)B = Inconsistent or limited-quality patient-oriented evidence (example: smaller cohort studies, case studies or control trials with limitations)C = Consensus, usual practice, opinion or weaker-level evidence

3.1

Perform a repeat medical assessment on all patients presenting with post-concussion symptoms 1-2 weeks following acute injury.

Tool 1.3: Manage Acute and Prolonged Symptoms Algorithm

Include a focused clinical history, focused physical examination, and consideration for the need for diagnostic tests including imaging. 

3.1a

Take a focused clinical history based on symptoms described.

Level of Evidence:   

 

Consider signs and symptoms in context with the child/adolescent’s normal performance, especially for those with pre-existing conditions (e.g., learning and communication deficits, ADHD, and/or physical disabilities) to identify the underlying causes of the prolonged symptoms or concerns and develop a management strategy.

3.1b

Examine the child/adolescent and perform a focused physical examination.

Level of Evidence:  

  • Vital signs (Resting heart rate and blood pressure).
  • A complete neurological examination (cranial nerve, motor, sensory, reflex, cerebellar, gait, balance testing) (Tool 2.1: Physical Examination).
  • A cervical spine examination (palpation, range of motion, provocative cervical spine tests) (Tool 2.1: Physical Examination.
  • Review mental health. Perform a post-concussive assessment and a cognitive screen, reassessing for existing and new mental health symptoms such as anxiety and mood. 
  • Screen the child/adolescent for medication/substances that may mask or modify the symptoms.
  • An examination of vestibular, visual, and oculomotor systems (e.g., Vestibular Ocular Motor Screening Tool (VOMS) or Visio-vestibular examination (VVE))
  • Consider a broad differential diagnosis for children/adolescents with prolonged symptoms.
  • Monitor the return-to-activity/sport and return-to-school status.

Further examination of the child/adolescent should be based on symptoms:

3.1c

Recommendation 2.1c:  Consider diagnostic brain or cervical spine MRI imaging for those with focal or worrisome symptoms. 

Level of Evidence:   MRI

Urgent conventional MRI should be considered in concussion patients who present with focal or worrisome symptoms (e.g., deteriorating vision, focal weakness or numbness, altered awareness, prominent behavioural changes, or worsening headaches that are not responding to treatment) and in whom a structural brain injury or abnormality is suspected. 

3.2

Provide patients with general education and guidance that outlines mental health considerations, non-pharmacological strategies to minimize symptoms including sleep hygiene, activity modifications, limiting triggers, information on screen time, the importance of social interaction, and how to work with the school team to facilitate school success. 

Level of Evidence:  

 

3.3

Encourage patients with post-concussion symptoms to engage in cognitive activity and low-risk physical activity as soon as tolerated  Activities that pose no/low risk of sustaining a concussion (no risk of contact, collision, or falling) should be resumed even if mild residual symptoms are present or whenever acute symptoms improve sufficiently to permit activity. Level of Evidence: A Gradual Return to physical activity aerobic exercise treatment. B Gradual return to cognitive activity. See Recommendation 2.3.

  • Refer select patients (e.g., highly-active or competitive athletes, those who are not tolerating a graduated return to physical activity, or those who are slow to recover) following acute injury to a medically supervised interdisciplinary team with the ability to individually assess aerobic exercise tolerance and to prescribe aerobic exercise treatment. This exercise tolerance assessment can be as early as 48 hours following acute injury. Level of Evidence:
  • Patients who are active may benefit from referral to a medically supervised interdisciplinary team with the ability to individually assess aerobic exercise tolerance and to prescribe aerobic exercise treatment. This exercise tolerance assessment can be as early as 48 hours following acute injury. Level of Evidence:

See the Living Guideline Post-Concussion Information Sheet for examples of low-risk activities. 

Links to exertion test resources:

3.4

Refer patients at elevated risk for delayed recovery to an interdisciplinary concussion team. Level of Evidence:

See Recommendation 2.1b: Note any modifiers that may delay recovery and use a clinical risk score to predict risk of prolonged symptoms.

Specialized interdisciplinary concussion care is ideally initiated for patients at elevated risk for a delayed recovery within the first two weeks post-injury. Level of Evidence:  

3.5

For those who are not referred initially (See recommendation 3.4), refer to specialized care with an interdisciplinary concussion team if post-concussion symptoms do not resolve by 2-4 weeks. Medical follow-ups may be needed to guide appropriate referrals.

Level of Evidence:   

See Tool 1.3 Manage Acute and Prolonged Symptoms Algorithm.

Assessment by an interdisciplinary concussion team can assist in identifying the type of management that is required, along with the medical and health professions on the interdisciplinary concussion team or external to this team who can provide the required management. Not all children/adolescents will require care from all members of the interdisciplinary concussion team and care should be targeted based on identified symptoms and patient needs. Symptoms that persist beyond 4 weeks (persisting symptoms after a concussion (PSAC) or persistent post-concussion symptoms (PPCS) may be related to the concussion, due to pre-existing conditions, or both.

Recommendation updated: Sept 2023

3.6

Iniate treatment for specific symptoms or concerns while waiting for a referral to an interdisciplinary concussion team or sub-specialist. 

Level of Evidence:   

 

3.7

Recommend regular medical follow-up if a child/adolescent is still experiencing post-concussion symptoms or has not completed the return-to-school or return-to-sport/activity stages. Recommend an immediate medical follow-up in the presence of any deterioration.

Level of Evidence:  

References

Research papers that support the present guideline recommendations:

Boutis, K., Weerdenburg, K., Koo, E., Schneeweiss, S., & Zemek, R. (2015). The diagnosis of concussion in a pediatric emergency department. Journal of Pediatrics, 166(5), 1214–1220.e1. https://doi.org/10.1016/j.jpeds.2015.02.013

Bramley, H., McFarland, C., Lewis, M. M., Shaffer, M. L., Cilley, R., Engbrecht, B., … Dias, M. S. (2014). Short-term outcomes of sport- and recreation-related concussion in patients admitted to a pediatric trauma service. Clinical Pediatrics, 53(8), 784–790. https://doi.org/10.1177/0009922814533403

Clark R, Stanfill AG. A Systematic Review of Barriers and Facilitators for Concussion Reporting Behavior among Student Athletes. Vol. 26, Journal of Trauma Nursing. Lippincott Williams and Wilkins; 2019. p. 297–311.

DePadilla PhD L, Miller PhD GF, Everett Jones PhD, MPH, JD S. Characteristics of Schools with Youth Sports Concussion-Related Educational Policies and Practices. J Sch Health. 2020;90(7):520–6.

Donnell, Z., Hoffman, R., Sarmiento, K., & Hays, C. (2018). Concussion attitudes, behaviors, and education among youth ages 12–17: Results from the 2014 YouthStyles survey. Journal of Safety Research, 64, 163–169. https://doi.org/10.1016/j.jsr.2017.12.001

Elbin, R. J., Sufrinko, A., Schatz, P., French, J., Henry, L., Burkhart, S., … Kontos, A. P. (2016). Removal From Play After Concussion and Recovery Time. Pediatrics, 138(3), e20160910–e20160910. https://doi.org/10.1542/peds.2016-0910

Feiss R, Lutz M, Reiche E, et al. A systematic review of the effectiveness of concussion education programs for coaches and parents of youth athletes. Vol. 17, International Journal of Environmental Research and Public Health. MDPI AG; 2020.

Fremont P, Schneider K, Laroche A, et al. Could a massive open online course be part of the solution to sport-related concussion? Participation and impact among 8368 registrants. BMJ Open Sport Exerc Med. 2020;6(1):1–7.

Howell, D. R., OʼBrien, M. J., Fraser, J., & Meehan, W. P. (2018). Continuing Play, Symptom Severity, and Symptom Duration After Concussion in Youth Athletes. Clinical Journal of Sport Medicine, 0(0), 1. https://doi.org/10.1097/jsm.0000000000000570

Linder, S. M., Cruickshank, J., Zimmerman, N. M., Figler, R., & Alberts, J. L. (2019). A technology-enabled electronic incident report to document and facilitate management of sport concussion: A cohort study of youth and young adults. Medicine, 98(14), e14948. https://doi.org/10.1097/MD.0000000000014948

Matveev, R., Sergio, L., Fraser-Thomas, J., & Macpherson, A. K. (2018). Trends in concussions at Ontario schools prior to and subsequent to the introduction of a concussion policy – An analysis of the Canadian hospitals injury reporting and prevention program from 2009 to 2016. BMC Public Health, 18(1), 1–10. https://doi.org/10.1186/s12889-018-6232-9

McCart, M., Glang, A. E., Slocumb, J., Gau, J., Beck, L., & Gomez, D. (2019). A quasi-experimental study examining the effects of online traumatic brain injury professional development on educator knowledge, application, and efficacy in a practitioner setting. Disability and Rehabilitation, 0(0), 1–7. https://doi.org/10.1080/09638288.2019.1578423

McGuine, T. A., Pfaller, A. Y., Post, E. G., Hetzel, S. J., Brooks, A., & Broglio, S. P. (2018). The influence of athletic trainers on the incidence and management of concussions in high school athletes. Journal of Athletic Training, 53(11), 1017–1024. https://doi.org/10.4085/1062-6050-209-18

Mckinlay, A., Ligteringen, V., & Than, M. (2014). A comparison of concussive symptoms reported by parents for preschool versus school-aged children. Journal of Head Trauma Rehabilitation, 29(3), 233–238. https://doi.org/10.1097/HTR.0b013e3182a2dd7f

Shendell, D. G., Gonzalez, L., Listwan, T. A., Pancella, J., Blackborow, M., & Boyd, J. (2019). Developing and Piloting a School-Based Online Adolescent Student-Athlete Concussion Surveillance System. Journal of School Health, 89(7), 527–535. https://doi.org/10.1111/josh.12775

Taubman, B., Rosen, F., McHugh, J., Grady, M. F., & Elci, O. U. (2016). The Timing of Cognitive and Physical Rest and Recovery in Concussion. Journal of Child Neurology, 31(14), 1555–1560. https://doi.org/10.1177/0883073816664835

Terwilliger, V. K., Pratson, L., Vaughan, C. G., & Gioia, G. A. (2016). Additional Post-Concussion Impact Exposure May Affect Recovery in Adolescent Athletes. Journal of Neurotrauma, 33(8), 761–765. https://doi.org/10.1089/neu.2015.4082

Zynda AJ, Sabatino MJ, Ellis HB, et al. Continued play following sport-related concussion in United States youth soccer. Int J Exerc Sci [Internet]. 2020;13(6):87–100. Available from: http://www.intjexersci.com

Research papers not associated with a current recommendation:

Dobney, D. M., Grilli, L., Kocilowicz, H., Beaulieu, C., Straub, M., Friedman, D., & Gagnon, I. J. (2018). Is There an Optimal Time to Initiate an Active Rehabilitation Protocol for Concussion Management in Children? A Case Series. Journal of Head Trauma Rehabilitation, 33(3), E11–E17. https://doi.org/10.1097/HTR.0000000000000339

Jones, K. M., Barker-Collo, S., Parmar, P., Starkey, N., Theadom, A., Ameratunga, S., & Feigin, V. L. (2018). Trajectories in health recovery in the 12 months following a mild traumatic brain injury in children: Findings from the BIONIC Study. Journal of Primary Health Care, 10(1), 81–89. https://doi.org/10.1071/HC17038

Date of last update: January 4, 2021

icon imgDomain 4: Medical Clearance for Full Contact Sport or High-Risk Activity

Introduction:

Medical clearance to return to full-contact sports or high-risk activities should be made on an individual basis using clinical judgment based on the findings of the medical follow-up. Presently there is no objective test to confirm physiological recovery following concussion. The child/adolescent should have returned to all school activities, including writing exams without accommodations related to their concussion/post-concussion symptoms before medical clearance is given for returning to full-contact sports or high-risk activities.

Recommendations

LEVEL OF EVIDENCE A = Consistent, good-quality, patient-oriented evidence (example: at least one large randomized control trial, meta-analysis or systematic review with homogeneity, or large, high- quality, multi-centre cohort study)B = Inconsistent or limited-quality patient-oriented evidence (example: smaller cohort studies, case studies or control trials with limitations)C = Consensus, usual practice, opinion or weaker-level evidence

4.1

Consider patients for medical clearance to return to full-contact activities and sport/game play if clinical criteria have been met.

The following clinical criteria should be considered or met before recommending that a child/adolescent returns to full-contact activities and sport/game play: 

  • ‘Return-to-Learn’: Return to pre-injury learning activities with no new academic support, including school accommodations or learning adjustments. Child/adolescent has successfully returned to all school activities including writing exams without symptoms above their previous pre-injury level or requiring accommodations related to their concussion/post-concussion symptoms, (i.e., child/adolescent may have pre-existing accommodations or new accommodations related to something other than their concussion).
  • Normal neurological and cervical spine examination.
  • ‘Complete symptom resolution’:  Resolution of symptoms associated with the current concussion at rest with no return of symptoms during or after maximal physical and cognitive exertion (back to the pre-injury state in patients with pre-existing conditions such as baseline headaches or mental health conditions). 
  • Return-to-Sport: Completion of the  Return to Activity/Sport protocol (2023 version) with no symptoms and no clinical findings associated with the current concussion at rest and with maximal physical exertion.
  •  No longer taking any drugs or substances atypical to their pre-injury functioning that could mask symptom presentation.

For children/adolescents with complex medical histories (e.g., repeated concussion, baseline concussion-like symptoms), see Recommendation 5.1 for information regarding returning to full-contact sports or high-risk activities, or retirement from full-contact sports or high-risk activities.

Definitions for ‘Complete symptom resolution’, ‘Return-to-Learn, and Return to sport have been harmonized with the Amsterdam International Consensus Statement on Concussion in Sport)

Updated Sept 2023

Level of Evidence:   

For children/adolescents with complex medical histories (e.g., repeated concussion, baseline concussion-like symptoms), see Recommendation 5.1 for information regarding returning to full-contact sports or high-risk activities, or retirement from full-contact sports or high-risk activities.

4.2

Provide patients with a letter indicating medical clearance to return to all activities when medically cleared. 

Level of Evidence:  

Link: Canadian Guideline on Concussion in Sport Medical Clearance Letter (Parachute Canada).

4.3

Advise medically cleared patients to seek immediate medical attention if he or she develops new concussion-like symptoms or sustains a new suspected concussion. 

Level of Evidence:   

Tool 1.2: Concussion Recognition Tool 5. To help identify concussion in children, adolescents, and adults.

Tools and Resources
Tools to Consider:
References

Research papers that support the present guideline recommendations:

Araujo, G. C., Antonini, T. N., Monahan, K., Gelfius, C., Klamar, K., Potts, M., … Bodin, D. (2014). The relationship between suboptimal effort and post-concussion symptoms in children and adolescents with mild traumatic brain injury. Clinical Neuropsychologist, 28(5), 786–801. https://doi.org/10.1080/13854046.2014.896415

Babcock, L., Kurowski, B. G., Zhang, N., Dexheimer, J. W., Dyas, J., & Wade, S. L. (2017). Adolescents with Mild Traumatic Brain Injury Get SMART: An Analysis of a Novel Web-Based Intervention. Telemedicine and E-Health, 23(7), 600–607. https://doi.org/10.1089/tmj.2016.0215

Babikian, T., McArthur, D., & Asarnow, R. F. (2013). Predictors of 1-month and 1-year neurocognitive functioning from the UCLA longitudinal mild, uncomplicated, pediatric traumatic brain injury study. Journal of the International Neuropsychological Society, 19(2), 145–154. https://doi.org/10.1017/S135561771200104X

Bonfield, C. M., Lam, S., Lin, Y., & Greene, S. (2013). The impact of attention deficit hyperactivity disorder on recovery from mild traumatic brain injury. Journal of Neurosurgery: Pediatrics, 12(2), 97–102. https://doi.org/10.3171/2013.5.PEDS12424

Brooks, B. L., Mannix, R., Maxwell, B., Zafonte, R., Berkner, P. D., & Iverson, G. L. (2016). Multiple Past Concussions in High School Football Players. American Journal of Sports Medicine, 44(12), 3243–3251. https://doi.org/10.1177/0363546516655095

Brooks, B. L., McKay, C. D., Mrazik, M., Barlow, K. M., Meeuwisse, W. H., & Emery, C. A. (2013). Subjective, but not Objective, Lingering Effects of Multiple Past Concussions in Adolescents. Journal of Neurotrauma, 30(17), 1469–1475. https://doi.org/10.1089/neu.2012.2720

Brooks, T. M., Smith, M. M., Silvis, R. M., Lerer, T., Mulvey, C. H., Maitland, R., … Smith, S. R. (2017). Symptom-Guided Emergency Department Discharge Instructions for Children with Concussion. Pediatric Emergency Care, 33(8), 553–563. https://doi.org/10.1097/PEC.0000000000000797

Collings, L. J., Cook, N. E., Porter, S., Kusch, C., Sun, J., Virji-Babul, N., … Panenka, W. J. (2017). Attention-deficit/hyperactivity disorder is associated with baseline child sport concussion assessment tool third edition scores in child hockey players. Brain Injury, 31(11), 1479–1485. https://doi.org/10.1080/02699052.2017.1377351

Cook, N. E., Huang, D. S., Silverberg, N. D., Brooks, B. L., Maxwell, B., Zafonte, R., … Iverson, G. L. (2017). Baseline cognitive test performance and concussion-like symptoms among adolescent athletes with ADHD: examining differences based on medication use. Clinical Neuropsychologist, 31(8), 1341–1352. https://doi.org/10.1080/13854046.2017.1317031

Cordingley, D., Girardin, R., Reimer, K., Ritchie, L., Leiter, J., Russell, K., & Ellis, M. J. (2016). Graded aerobic treadmill testing in pediatric sports-related concussion: safety, clinical use, and patient outcomes. Journal of Neurosurgery: Pediatrics, 18(6), 693–702. https://doi.org/10.3171/2016.5.PEDS16139

DeMatteo, C. A., Randall, S., Lin, C. Y. A., & Claridge, E. A. (2019). What comes first: Return to school or return to activity for youth after concussion? Maybe we don’t have to choose. Frontiers in Neurology, 10(JUL), 1–9. https://doi.org/10.3389/fneur.2019.00792

Donders, J., & DeWit, C. (2017). Parental ratings of daily behavior and child cognitive test performance after pediatric mild traumatic brain injury. Child Neuropsychology, 23(5), 554–570. https://doi.org/10.1080/09297049.2016.1161015

Elbin, R. J., Kontos, A. P., Kegel, N., Johnson, E., Burkhart, S., & Schatz, P. (2013). Individual and combined effects of LD and ADHD on computerized neurocognitive concussion test performance: Evidence for separate norms. Archives of Clinical Neuropsychology, 28(5), 476–484. https://doi.org/10.1093/arclin/act024

Gardner, R. M., Yengo-Kahn, A., Bonfield, C. M., & Solomon, G. S. (2017). Comparison of baseline and post-concussion ImPACT test scores in young athletes with stimulant-treated and untreated ADHD. Physician and Sportsmedicine, 45(1), 1–10. https://doi.org/10.1080/00913847.2017.1248221

Haarbauer-Krupa, J. K., Comstock, R. D., Lionbarger, M., Hirsch, S., Kavee, A., & Lowe, B. (2018). Healthcare professional involvement and RTP compliance in high school athletes with concussion. Brain Injury, 32(11), 1337–1344. https://doi.org/10.1080/02699052.2018.1482426

Haider, M. N., Leddy, J. J., Pavlesen, S., Kluczynski, M., Baker, J. G., Miecznikowski, J. C., & Willer, B. S. (2018). A systematic review of criteria used to define recovery from sport-related concussion in youth athletes. British Journal of Sports Medicine, 52(18), 1179–1190. https://doi.org/10.1136/bjsports-2016-096551

Iverson, G. L., Atkins, J. E., Zafonte, R., & Berkner, P. D. (2016). Concussion History in Adolescent Athletes with Attention-Deficit Hyperactivity Disorder. Journal of Neurotrauma, 33(23), 2077–2080. https://doi.org/10.1089/neu.2014.3424

MacDonald, J., Patel, N., Young, J., & Stuart, E. (2018). Returning Adolescents to Driving after Sports-Related Concussions: What Influences Physician Decision-Making. Journal of Pediatrics, 194, 177–181. https://doi.org/10.1016/j.jpeds.2017.10.032

Mannix, R., Iverson, G. L., Maxwell, B., Atkins, J. E., Zafonte, R., & Berkner, P. D. (2014). Multiple prior concussions are associated with symptoms in high school athletes. Annals of Clinical and Translational Neurology, 1(6), 433–438. https://doi.org/10.1002/acn3.70

Marshall CM, Chan N, Tran P, et al. The use of an intensive physical exertion test as a final return to play measure in concussed athletes: a prospective cohort. Phys Sportsmed [Internet]. 2019 Apr 3;47(2):158–66. Available from: https://www.tandfonline.com/doi/full/10.1080/00913847.2018.1542258

McCrory, P., Meeuwisse, W., Dvořák, J., Aubry, M., Bailes, J., … Vos, P.E. (2017) Consensus statement on concussion in sport—the 5th international conference on concussion in sport held in Berlin, October 2016. British Journal of Sports Medicine. 51(11),838-847. https://doi.org/10.1136/bjsports-2017-097699

McKay, C. D., Schneider, K. J., Brooks, B. L., Mrazik, M., & Emery, C. A. (2014). Baseline Evaluation in Youth Ice Hockey Players: Comparing Methods for Documenting Prior Concussions and Attention or Learning Disorders. Journal of Orthopaedic & Sports Physical Therapy, 44(5), 329–335. https://doi.org/10.2519/jospt.2014.5053

Nowacki, R., van Eldik, N., Eikens, M., Roijen, R., Haga, N., Schott, D., … Wennekes, M. (2017). Evaluation of a follow-up program for mild traumatic brain injury in schoolchildren. European Journal of Paediatric Neurology, 21(2), 382–387. https://doi.org/10.1016/j.ejpn.2016.10.009

Reed, N., Taha, T., Monette, G., & Keightley, M. (2016). A Preliminary Exploration of Concussion and Strength Performance in Youth Ice Hockey Players. International Journal of Sports Medicine, 37(9), 708–713. https://doi.org/10.1055/s-0042-104199

Root, J. M., Zuckerbraun, N. S., Wang, L., Winger, D. G., Brent, D., Kontos, A., & Hickey, R. W. (2016). History of Somatization Is Associated with Prolonged Recovery from Concussion. Journal of Pediatrics, 174, 39–44.e1. https://doi.org/10.1016/j.jpeds.2016.03.020

Sady, M. D., Vaughan, C. G., & Gioia, G. A. (2014). Psychometric characteristics of the postconcussion symptom inventory in children and adolescents. Archives of Clinical Neuropsychology, 29(4), 348–363. https://doi.org/10.1093/arclin/acu014

Salinas, C. M., Dean, P., LoGalbo, A., Dougherty, M., Field, M., & Webbe, F. M. (2016). Attention-Deficit Hyperactivity Disorder Status and Baseline Neurocognitive Performance in High School Athletes. Applied Neuropsychology: Child, 5(4), 264–272. https://doi.org/10.1080/21622965.2015.1052814

Tamura K, Furutani T, Oshiro R, et al. Concussion recovery timeline of high school athletes using a stepwise return-to-play protocol: Age and sex effects. J Athl Train [Internet]. 2020 Jan 1;55(1):6–10. Available from: https://meridian.allenpress.com/jat/article/55/1/6/433840/Concussion-Recovery-Timeline-of-High-School

Date Updated: January 4, 2021

icon imgDomain 5: Sport Concussion Considerations

Introduction:

Return to full-contact sport or high-risk activity decisions may be complicated for children/adolescents who have experienced multiple concussions or who have baseline conditions that are associated with concussion-like symptoms. Numerous factors including concussion history, co-morbidities, contraindications, symptom presentation, injury threshold, and sequelae should be considered when making return to sport decisions for children/adolescents who have complex medical histories. The current evidence does not support an added benefit of baseline testing. Mandatory pre-season baseline testing is not recommended.

Link: Parachute Statement on Baseline Testing (Parachute Canada).

Recommendations

LEVEL OF EVIDENCE A = Consistent, good-quality, patient-oriented evidence (example: at least one large randomized control trial, meta-analysis or systematic review with homogeneity, or large, high- quality, multi-centre cohort study)B = Inconsistent or limited-quality patient-oriented evidence (example: smaller cohort studies, case studies or control trials with limitations)C = Consensus, usual practice, opinion or weaker-level evidence

5.1

Refer a child/adolescent with multiple concussions or baseline conditions associated with concussion-like symptoms to an interdisciplinary concussion team to help with return to full-contact sports or high-risk activities or retirement decisions from full-contact sports or high-risk activities.

Level of Evidence:  

Return to full-contact sport or high-risk activity decisions can be complicated for children/adolescents with more complex medical histories. The following factors should be taken into consideration in the discussion and decisions made about return-to-sport or retirement: 

  • Concussion history.
  • Co-morbidities (e.g., learning and communication deficits, ADHD, physical disabilities, psychiatric disorders).
  • Absolute contraindications for return-to-sport and high-risk activities.
  • Early recurrence or greater frequency of symptoms.
  • Lower injury threshold.
  • Increasing recovery time.
  • Potential short- and long-term sequelae.

Some patients may benefit from neuropsychological assessment to determine resolution of cognitive problems. If a post-injury cognitive or neuropsychological assessment is deemed clinically necessary, it is recommended that this assessment be interpreted by a pediatric neuropsychologist.

5.2

Baseline testing on children/adolescents using concussion assessment tools or tests (or any combination of tests/tools) is not recommended or required for concussion diagnosis or management following an injury. 

Level of Evidence:   

See the Parachute Statement on Baseline Testing for more information (Parachute Canada). 

“Baseline testing refers to the practice of having an athlete complete certain concussion assessment tools/tests prior to sports participation to provide baseline measurements that can be compared to post-injury values in the event of a suspected concussion. Current evidence does not support a significant added benefit of baseline testing athletes. This includes the Child SCAT5 and the SCAT5 tools, as well as neuropsychological and neurocognitive tests, both computerized or not.” (Parachute Statement on Baseline Testing)

See Recommendation 5.3: Special considerations regarding baseline testing.

5.3

Special considerations regarding baseline testing.

Level of Evidence:   

Please consult the Parachute Statement on Baseline Testing for more information (Parachute Canada).

“There may be unique athlete populations and sports environments where baseline testing may be considered. These situations should be considered the exception and not the rule.” 

  • “Clinical neuropsychologists may consider baseline cognitive or neuropsychological testing in select youth athletes (greater than 12 years old) who have pre-existing conditions, such as a history of previous concussion, ADHD, or learning disorders, that may impact the interpretation of post-injury test results.”
  • “Certain teams and sporting federations have well-established physician-supervised concussion protocols with dedicated experienced healthcare professionals working directly and continuously with youth athletes (i.e., that are present at training and competition events). In these sport environments, baseline testing may be considered as an optional assessment within the comprehensive concussion protocol as long as the medical teams caring for these athletes include experienced healthcare professionals who have competency-based training and clinical experience to allow them to administer and interpret these tests.” 

(Reproduced with permission from Parachute Canada: Parachute Statement on Baseline Testing).

 

5.4

Recommendation 2.3d: Refer select patients (e.g., highly active or competitive athletes, those who are not tolerating a graduated return to physical activity, or those who are slow to recover) to a medically supervised interdisciplinary team with the ability to individually assess sub-symptom threshold aerobic exercise tolerance and to prescribe aerobic exercise treatment.

Level of Evidence:  

Tools and Resources
References

Research papers that support the present guideline recommendations:

Abeare, C. A., Messa, I., Zuccato, B. G., Merker, B., & Erdodi, L. (2018). Prevalence of invalid performance on baseline testing for sport-related concussion by age and validity indicator. JAMA Neurology, 75(6), 697–703. https://doi.org/10.1001/jamaneurol.2018.0031

Anthony, C. A., & Peterson, A. R. (2015). Utilization of a text-messaging robot to assess intraday variation in concussion symptom severity scores. Clinical Journal of Sport Medicine, 25(2), 149–152. https://doi.org/10.1097/JSM.0000000000000115

Araujo, G. C., Antonini, T. N., Monahan, K., Gelfius, C., Klamar, K., Potts, M., … Bodin, D. (2014). The relationship between suboptimal effort and post-concussion symptoms in children and adolescents with mild traumatic brain injury. Clinical Neuropsychologist, 28(5), 786–801. https://doi.org/10.1080/13854046.2014.896415

Baker, D. A., Connery, A. K., Kirk, J. W., & Kirkwood, M. W. (2014). Embedded performance validity indicators within the california verbal learning test, childrens version. Clinical Neuropsychologist, 28(1), 116–127. https://doi.org/10.1080/13854046.2013.858184

Brett, B. L., & Solomon, G. S. (2017). The influence of validity criteria on Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) test–retest reliability among high school athletes. Journal of Clinical and Experimental Neuropsychology, 39(3), 286–295. https://doi.org/10.1080/13803395.2016.1224322

Brett, B. L., Smyk, N., Solomon, G., Baughman, B. C., & Schatz, P. (2016). Long-term Stability and Reliability of Baseline Cognitive Assessments in High School Athletes Using ImPACT at 1-, 2-, and 3-year Test–Retest Intervals. Archives of Clinical Neuropsychology, (August), 904–914. https://doi.org/10.1093/arclin/acw055

Brooks, B. L., Iverson, G. L., Atkins, J. E., Zafonte, R., & Berkner, P. D. (2016). Sex Differences and Self-Reported Attention Problems During Baseline Concussion Testing. Applied Neuropsychology: Child, 5(2), 119–126. https://doi.org/10.1080/21622965.2014.1003066

Brooks, B. L., Mannix, R., Maxwell, B., Zafonte, R., Berkner, P. D., & Iverson, G. L. (2016). Multiple Past Concussions in High School Football Players. American Journal of Sports Medicine, 44(12), 3243–3251. https://doi.org/10.1177/0363546516655095

Brooks, B. L., McKay, C. D., Mrazik, M., Barlow, K. M., Meeuwisse, W. H., & Emery, C. A. (2013). Subjective, but not Objective, Lingering Effects of Multiple Past Concussions in Adolescents. Journal of Neurotrauma, 30(17), 1469–1475. https://doi.org/10.1089/neu.2012.2720

Brooks, M. A., Snedden, T. R., Mixis, B., Hetzel, S., & McGuine, T. A. (2017). Establishing baseline normative values for the child sport concussion assessment tool. JAMA Pediatrics, 171(7), 670–677. https://doi.org/10.1001/jamapediatrics.2017.0592

Chin, E. Y., Nelson, L. D., Barr, W. B., McCrory, P., & McCrea, M. A. (2016). Reliability and validity of the sport concussion assessment tool-3 (SCAT3) in high school and collegiate athletes. American Journal of Sports Medicine, 44(9), 2276–2285. https://doi.org/10.1177/0363546516648141

Collings, L. J., Cook, N. E., Porter, S., Kusch, C., Sun, J., Virji-Babul, N., … Panenka, W. J. (2017). Attention-deficit/hyperactivity disorder is associated with baseline child sport concussion assessment tool third edition scores in child hockey players. Brain Injury, 31(11), 1479–1485. https://doi.org/10.1080/02699052.2017.1377351

Cook, N. E., Huang, D. S., Silverberg, N. D., Brooks, B. L., Maxwell, B., Zafonte, R., … Iverson, G. L. (2017). Baseline cognitive test performance and concussion-like symptoms among adolescent athletes with ADHD: examining differences based on medication use. Clinical Neuropsychologist, 31(8), 1341–1352. https://doi.org/10.1080/13854046.2017.1317031

Cook, N. E., Kelshaw, P. M., Caswell, S. V., & Iverson, G. L. (2019). Children with Attention-Deficit/Hyperactivity Disorder Perform Differently on Pediatric Concussion Assessment. Journal of Pediatrics, 214, 168-174.e1. https://doi.org/10.1016/j.jpeds.2019.07.048

Covassin, T., Crutcher, B., & Wallace, J. (2013). Does a 20 minute cognitive task increase concussion symptoms in concussed athletes? Brain Injury, 27(13–14), 1589–1594. https://doi.org/10.3109/02699052.2013.823656

Custer, A., Sufrinko, A., Elbin, R. J., Covassin, T., Collins, M., & Kontos, A. (2016). High baseline postconcussion symptom scores and concussion outcomes in athletes. Journal of Athletic Training, 51(2), 136–141. https://doi.org/10.4085/1062-6050-51.2.12

Davis, G. A., Purcell, L., Schneider, K. J., Yeates, K. O., Gioia, G. A., Anderson, V., … Kutcher, J. S. (2017). The Child Sport Concussion Assessment Tool 5th Edition (Child SCAT5): Background and rationale. British Journal of Sports Medicine, 51(11), 859–861. https://doi.org/10.1136/bjsports-2017-097492

Elbin, R. J., Kontos, A. P., Kegel, N., Johnson, E., Burkhart, S., & Schatz, P. (2013). Individual and combined effects of LD and ADHD on computerized neurocognitive concussion test performance: Evidence for separate norms. Archives of Clinical Neuropsychology, 28(5), 476–484. https://doi.org/10.1093/arclin/act024

Gardner, R. M., Yengo-Kahn, A., Bonfield, C. M., & Solomon, G. S. (2017). Comparison of baseline and post-concussion ImPACT test scores in young athletes with stimulant-treated and untreated ADHD. Physician and Sportsmedicine, 45(1), 1–10. https://doi.org/10.1080/00913847.2017.1248221

Gidley Larson, J. C., Flaro, L., Peterson, R. L., Connery, A. K., Baker, D. A., & Kirkwood, M. W. (2015). The medical symptom validity test measures effort not ability in children: A comparison between mild TBI and fetal alcohol spectrum disorder samples. Archives of Clinical Neuropsychology, 30(3), 192–199. https://doi.org/10.1093/arclin/acv012

Glaviano, N. R., Benson, S., Goodkin, H. P., Broshek, D. K., & Saliba, S. (2015). Baseline SCAT2 Assessment of Healthy Youth Student-Athletes: Preliminary Evidence for the Use of the Child-SCAT3 in Children Younger Than 13 Years. Clinical Journal of Sport Medicine, 25(4), 373–379. https://doi.org/10.1097/JSM.0000000000000154

Gorman, M., Hecht, S., Samborski, A., Lunos, S., Elias, S., & Stovitz, S. D. (2017). SCAT3 assessment of non-head injured and head injured athletes competing in a large international youth soccer tournament. Applied Neuropsychology: Child, 6(4), 364–368. https://doi.org/10.1080/21622965.2016.1210011

Green, C. M., Kirk, J. W., Connery, A. K., Baker, D. A., & Kirkwood, M. W. (2014). The use of the Rey 15-Item Test and recognition trial to evaluate noncredible effort after pediatric mild traumatic brain injury. Journal of Clinical and Experimental Neuropsychology, 36(3), 261–267. https://doi.org/10.1080/13803395.2013.879096

Haider, M. N., Leddy, J. J., Pavlesen, S., Kluczynski, M., Baker, J. G., Miecznikowski, J. C., & Willer, B. S. (2018). A systematic review of criteria used to define recovery from sport-related concussion in youth athletes. British Journal of Sports Medicine, 52(18), 1179–1190. https://doi.org/10.1136/bjsports-2016-096551

Higgins, K. L., Denney, R. L., & Maerlender, A. (2017). Sandbagging on the immediate post-concussion assessment and cognitive testing (impact) in a high school athlete population. Archives of Clinical Neuropsychology, 32(3), 259–266. https://doi.org/10.1093/arclin/acw108

Iverson, G. L., Silverberg, N. D., Mannix, R., Maxwell, B. A., Atkins, J. E., Zafonte, R., & Berkner, P. D. (2015). Factors associated with concussion-like symptom reporting in high school athletes. JAMA Pediatrics, 169(12), 1132–1140. https://doi.org/10.1001/jamapediatrics.2015.2374

Kirk, J. W., Hutaff-Lee, C. F., Connery, A. K., Baker, D. A., & Kirkwood, M. W. (2014). The Relationship Between the Self-Report BASC-2 Validity Indicators and Performance Validity Test Failure After Pediatric Mild Traumatic Brain Injury. Assessment, 21(5), 562–569. https://doi.org/10.1177/1073191114520626

Kirkwood, M. W., Peterson, R. L., Connery, A. K., Baker, D. A., & Grubenhoff, J. A. (2014). Postconcussive Symptom Exaggeration After Pediatric Mild Traumatic Brain Injury. Pediatrics, 133(4), 643–650. https://doi.org/10.1542/peds.2013-3195

Kuhn, A. W., & Solomon, G. S. (2014). Supervision and computerized neurocognitive baseline test performance in high school athletes: An initial investigation. Journal of Athletic Training, 49(6), 800–805. https://doi.org/10.4085/1062-6050-49.3.66

Lichtenstein, J. D., Moser, R. S., & Schatz, P. (2014). Age and test setting affect the prevalence of invalid baseline scores on neurocognitive tests. American Journal of Sports Medicine, 42(2), 479–484. https://doi.org/10.1177/0363546513509225

Liller, K. D., Morris, B., Fillion, J., Yang, Y., & Bubu, O. M. (2017). Analysis of baseline computerized neurocognitive testing results among 5-11-year-old male and female children playing sports in recreational leagues in Florida. International Journal of Environmental Research and Public Health, 14(9). https://doi.org/10.3390/ijerph14091028

Lovell, M. R., & Solomon, G. S. (2013). Neurocognitive test performance and symptom reporting in cheerleaders with concussions. Journal of Pediatrics, 163(4), 1192–1195.e1. https://doi.org/10.1016/j.jpeds.2013.05.061

MacDonald, J., & Duerson, D. (2015). Reliability of a Computerized Neurocognitive Test in Baseline Concussion Testing of High School Athletes. Clinical Journal of Sport Medicine, 25(4), 367–372. https://doi.org/10.1097/JSM.0000000000000139

Mannix, R., Iverson, G. L., Maxwell, B., Atkins, J. E., Zafonte, R., & Berkner, P. D. (2014). Multiple prior concussions are associated with symptoms in high school athletes. Annals of Clinical and Translational Neurology, 1(6), 433–438. https://doi.org/10.1002/acn3.70

McGrath, N., Dinn, W. M., Collins, M. W., Lovell, M. R., Elbin, R. J., & Kontos, A. P. (2013). Post-exertion neurocognitive test failure among student-athletes following concussion. Brain Injury, 27(1), 103–113. https://doi.org/10.3109/02699052.2012.729282

McKay, C. D., Schneider, K. J., Brooks, B. L., Mrazik, M., & Emery, C. A. (2014). Baseline Evaluation in Youth Ice Hockey Players: Comparing Methods for Documenting Prior Concussions and Attention or Learning Disorders. Journal of Orthopaedic & Sports Physical Therapy, 44(5), 329–335. https://doi.org/10.2519/jospt.2014.5053

Moran, R. N., & Covassin, T. (2018). King-Devick test normative reference values and internal consistency in youth football and soccer athletes. Scandinavian Journal of Medicine and Science in Sports, 28(12), 2686–2690. https://doi.org/10.1111/sms.13286

Moser, R. S., Olek, L., & Schatz, P. (2019). Gender Differences in Symptom Reporting on Baseline Sport Concussion Testing Across the Youth Age Span. Archives of Clinical Neuropsychology : The Official Journal of the National Academy of Neuropsychologists, 34(1), 50–59. https://doi.org/10.1093/arclin/acy007

Moser, R. S., Schatz, P., Grosner, E., & Kollias, K. (2017). One year test–retest reliability of neurocognitive baseline scores in 10- to 12-year olds. Applied Neuropsychology: Child, 6(2), 166–171. https://doi.org/10.1080/21622965.2016.1138310

Nelson, L. D., Laroche, A. A., Pfaller, A. Y., Lerner, E. B., Hammeke, T. A., Randolph, C., … McCrea, M. A. (2015). Prospective, head-to-head study of three computerized neurocognitive assessment tools (CNTs): Reliability and validity for the assessment of sport-related concussion. Journal of the International Neuropsychological Society, 22(1), 24–37. https://doi.org/10.1017/S1355617715001101

Nelson, L. D., Loman, M. M., LaRoche, A. A., Furger, R. E., & McCrea, M. A. (2017). Baseline Performance and Psychometric Properties of the Child Sport Concussion Assessment Tool 3 (Child-SCAT3) in 5- to 13-year-old Athletes. Clinical Journal of Sport Medicine, 27(4), 381–387. https://doi.org/10.1097/JSM.0000000000000369

Nelson, L. D., Pfaller, A. Y., Rein, L. E., & McCrea, M. A. (2015). Rates and Predictors of Invalid Baseline Test Performance in High School and Collegiate Athletes for 3 Computerized Neurocognitive Tests: NAM,Axon Sports, and ImPACT. American Journal of Sports Medicine, 43(8), 2018–2026. https://doi.org/10.1177/0363546515587714

Newcomer, R. R., & Perna, F. M. (2003). Adolescent Athletes. Journal of Athletic Training, 38(2), 163–166.

Ott, S., Schatz, P., Solomon, G., & Ryan, J. J. (2014). Neurocognitive performance and symptom profiles of spanish-speaking hispanic athletes on the impact test. Archives of Clinical Neuropsychology, 29(2), 152–163. https://doi.org/10.1093/arclin/act091

Pawlukiewicz, A., Yengo-Kahn, A. M., & Solomon, G. (2017). The effect of pretest exercise on baseline computerized neurocognitive test scores. Orthopaedic Journal of Sports Medicine, 5(10), 1–6. https://doi.org/10.1177/2325967117734496

Peltonen, K., Vartiainen, M., Laitala-Leinonen, T., Koskinen, S., Luoto, T., Pertab, J., & Hokkanen, L. (2019). Adolescent athletes with learning disability display atypical maturational trajectories on concussion baseline testing: Implications based on a Finnish sample. Child Neuropsychology, 25(3), 336–351. https://doi.org/10.1080/09297049.2018.1474865

Porter, S., Smith-Forrester, J., Alhajri, N., Kusch, C., Sun, J., Barrable, B., … Virji-Babul, N. (2017). The Child Sport Concussion Assessment Tool (Child SCAT3): Normative values and correspondence between child and parent symptom scores in male child athletes. BMJ Open Sport and Exercise Medicine, 3(1), 1–6. https://doi.org/10.1136/bmjsem-2015-000029

Reesman, J., Pineda, J., Carver, J., Brice, P. J., Andrew Zabel, T., & Schatz, P. (2016). Utility of the ImPACT test with deaf adolescents. Clinical Neuropsychologist, 30(2), 318–327. https://doi.org/10.1080/13854046.2016.1142613

Reynolds, E., Fazio, V. C., Sandel, N., Schatz, P., & Henry, L. C. (2016). Cognitive Development and the Immediate Postconcussion Assessment and Cognitive Testing: A Case for Separate Norms in Preadolescents. Applied Neuropsychology: Child, 5(4), 283–293. https://doi.org/10.1080/21622965.2015.1057637

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Date of last update: November 16, 2019

Section B:

Managing Concussion Symptoms

Section C:

Biomarkers