How to Use the SCAT6 for Concussion Management: A Clinician's Guide
A comprehensive, step-by-step guide to administering, scoring, and interpreting the Sport Concussion Assessment Tool - 6th Edition.
What is the SCAT6?
The Sport Concussion Assessment Tool - 6th Edition (SCAT6) is the internationally accepted gold-standard tool for evaluating sport-related concussion in athletes aged 13 years and older. It was published in the British Journal of Sports Medicine in June 2023 following the 6th International Conference on Concussion in Sport, held in Amsterdam in October 2022.
The SCAT6 is designed specifically for acute assessment within 0-72 hours post-injury. It is used on the sideline, in the change room, in the emergency department, and in early clinical settings during the first three days following a suspected concussion. It should not be used for office-based follow-up beyond Day 3 -- the SCOAT6 (Sport Concussion Office Assessment Tool - 6th Edition) is the appropriate instrument for that context.
The tool provides a structured, multi-domain assessment covering:
- Symptom scoring -- 22 symptoms rated on a 0-6 severity scale
- Cognitive screening -- orientation, immediate memory, concentration, and delayed recall
- Neurological screening -- red flags, cranial nerves, coordination, and observable signs
- Postural stability -- modified Balance Error Scoring System (mBESS) and tandem gait
Critically, the SCAT6 is a screening tool, not a diagnostic instrument. It informs clinical decision-making but does not replace clinical judgment. A normal SCAT6 score does not rule out concussion, and an abnormal score does not confirm it. The tool must be interpreted within the context of the full clinical picture.
Why Use a Digital SCAT6?
While the SCAT6 was published as a paper-based form, the transition to digital administration offers significant clinical advantages. These are not theoretical -- they have measurable impact on assessment quality and workflow efficiency.
Faster completion compared to paper forms
Arithmetic errors with automatic scoring
Mobile accessibility -- assess anywhere
Accuracy and efficiency are the primary drivers. The SCAT6 symptom severity score requires summing 22 individual symptom ratings (each 0-6) and calculating a total symptom count. The SAC requires tallying scores across four cognitive domains. The mBESS requires counting errors across three stances. Manual calculation of these scores under sideline pressure is a known source of error.
Real-time data capture means assessment results are immediately available for comparison against baseline values and previous assessments. This is essential for tracking recovery trajectories and making informed RTP decisions.
Mobile accessibilitymeans the SCAT6 is available on the device already in the clinician's pocket. No more searching for paper forms, realising they are the wrong edition, or trying to read handwriting days later.
Key Components of the SCAT6
1. Red Flags and Observable Signs
The assessment begins with an immediate safety screen. Red flags include neck pain or tenderness, double vision, weakness or tingling in the limbs, severe or increasing headache, seizure, loss of consciousness, and deteriorating conscious state. Any red flag requires immediate emergency department referral. Observable signs include lying motionless on the playing surface, disorientation or confusion, blank or vacant look, balance/gait difficulties, and facial injury suggesting head trauma.
2. Symptom Evaluation
The athlete rates 22 symptoms on a 0-6 severity scale (0 = none, 6 = severe). This generates two scores: the symptom severity score (sum of all ratings, max 132) and the total number of symptomsendorsed (max 22). The symptom evaluation also captures whether the athlete feels “not normal” and whether physical or mental activity worsens symptoms. Where available, comparison to a pre-injury baseline dramatically improves interpretive accuracy.
3. Cognitive Screening (SAC)
The Standardized Assessment of Concussion (SAC) evaluates four cognitive domains. Orientation (month, date, day, year, time -- 5 points). Immediate Memory (three trials of a 5 or 10-word list -- 15 or 30 points). Concentration (digits backward starting at 3 digits and increasing, plus months of the year in reverse -- up to 5 points). Delayed Recall (recall of the word list after a minimum 5-minute interval -- 5 or 10 points). The delayed recall must be administered after the balance examination has been completed.
4. Neurological Screen
Includes assessment of speech (fluency, word-finding), eye movements (pursuit, saccades), coordination (finger-to-nose), and reading ability. The clinician documents any abnormalities observed. While brief, this screen can identify gross neurological deficits that require urgent investigation.
5. Balance Assessment
The modified Balance Error Scoring System (mBESS) tests three stances on a firm surface: double-leg (feet together), single-leg (non-dominant foot), and tandem (non-dominant foot behind dominant). Each stance is held for 20 seconds with eyes closed and hands on hips. Errors are counted for each stance (maximum 10 errors per stance, 30 total). The tandem gait test requires the athlete to walk heel-to-toe along a 3-metre line and back as quickly as possible; the best time of four trials is recorded.
Step-by-Step Administration Guide
Prepare the Environment
Ensure a quiet, controlled environment where possible. On the sideline, move the athlete to a quiet area away from crowd noise and coaching staff. Have a stopwatch or timer available for the mBESS (20-second intervals) and tandem gait. If using a digital platform, ensure the device is charged and the correct assessment form is loaded.
Screen for Red Flags
Before proceeding with the full assessment, screen for all red flags. If any are present, do not continue with the SCAT6 -- arrange immediate emergency department transfer. Document which red flags were identified and the time of assessment.
Administer Symptom Evaluation
Read each of the 22 symptoms aloud and ask the athlete to rate severity from 0 to 6. Do not lead the athlete or suggest ratings. Record the total symptom count and symptom severity score. Ask the additional questions about feeling “not normal” and symptom aggravation with physical/mental activity.
Conduct Cognitive Screening
Administer the SAC in sequence: orientation, immediate memory (three trials), concentration (digits backward, then months in reverse). Note the word list number used. Instruct the athlete to remember the words for later recall. Do NOT administer delayed recall at this point -- it must follow the balance examination with a minimum 5-minute interval from the last immediate memory trial.
Perform Balance Assessment
Administer the mBESS (double-leg, single-leg, tandem stance -- 20 seconds each) and the tandem gait test (four trials, record best time). Count and document errors for each mBESS stance. Ensure the athlete removes shoes for the mBESS if possible and stands on a firm surface.
Complete Delayed Recall and Interpret
After a minimum of 5 minutes from the final immediate memory trial, ask the athlete to recall the word list without prompting. Record the number of words correctly recalled. Review all scores, compare to baseline where available, and document your clinical impression. Remember: the SCAT6 informs your clinical judgment -- it does not replace it.
Clinical Caveats
Effective use of the SCAT6 requires understanding its limitations as well as its strengths. The following caveats are essential for competent clinical practice:
Not Diagnostic Alone
The SCAT6 is a screening tool, not a standalone diagnostic instrument. A “normal” SCAT6 does not exclude concussion. An “abnormal” SCAT6 does not confirm it. Clinical judgment, informed by the full clinical picture, remains paramount.
Baseline Is Essential
Without a pre-injury baseline, interpretation of SCAT6 scores relies on normative data, which has significant individual variation. Pre-season baseline testing dramatically improves the sensitivity and specificity of post-injury assessment.
Acute Use Only (0-72 Hours)
The SCAT6 is validated for use within 72 hours of injury. For office-based follow-up from Day 3 onwards, the SCOAT6 must be used. Continuing to use SCAT6 beyond the acute window misses critical assessment domains (VOMS, cervical spine, structured RTP) and is below standard of care.
Combine with Broader Clinical Approach
The SCAT6 should be part of a comprehensive concussion management approach that includes clinical history, neurological examination, vestibular-ocular screening (via SCOAT6 or standalone VOMS), cervical spine assessment, and consideration of psychosocial factors. No single tool captures the full complexity of concussion.
Age-Appropriate Tools
The SCAT6 is validated for athletes aged 13 years and older. For children aged 5-12 years, the Child SCAT6 must be used. It includes modified symptom lists, simplified cognitive tasks, and parent/carer report components appropriate for the developmental level.
References
- Echemendia, R. J., et al. (2023). Sport Concussion Assessment Tool - 6th Edition (SCAT6). British Journal of Sports Medicine, 57(11), 622-631. bjsm.bmj.com/content/57/11/622
- Patricios, J. S., et al. (2023). Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport -- Amsterdam, October 2022. British Journal of Sports Medicine, 57(11), 695-711.
- Echemendia, R. J., et al. (2023). Sport Concussion Office Assessment Tool - 6th Edition (SCOAT6). British Journal of Sports Medicine, 57(11), 651-665.
- Davis, G. A., et al. (2023). Child Sport Concussion Assessment Tool - 6th Edition (Child SCAT6). British Journal of Sports Medicine, 57(11), 632-650.
- Concussion in Sport Australia. concussioninsport.gov.au
Patient still symptomatic past Day 30? SCAT6 covers the acute window (0-72h); SCOAT6 covers Day 3-30. Beyond that, 5-20% of cases develop persistent post-concussion symptoms (PPCS) requiring a different workup — vestibulo-ocular + cervical + autonomic. See our PPCS clinical workup guide and join the waitlist for the forthcoming PPCS Clinical Mastery course.
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