SCAT-6 Evaluation for Concussion
The SCAT-6 is a standardized sideline assessment tool performed within 72 hours of suspected concussion that evaluates four key domains: symptom severity, cognitive function (orientation, immediate/delayed memory, concentration), balance (modified Balance Error Scoring System), and tandem gait, with maximal diagnostic utility in the first 72 hours post-injury. 1
When to Perform SCAT-6
Remove any athlete with suspected concussion from play immediately - they should never return to play the same day, even if symptoms resolve 2, 3. The SCAT-6 should be administered as soon as safely possible after injury, ideally by a healthcare professional trained in its use 4.
Core Components of SCAT-6 Administration
1. Symptom Evaluation (22 symptoms)
The athlete self-rates each symptom on a 0-6 severity scale 2:
- Physical: headache, nausea, vomiting, balance problems, dizziness, light/noise sensitivity
- Cognitive: feeling "foggy" or "slow", difficulty concentrating/remembering
- Emotional: irritability, sadness, nervousness
- Sleep-related: trouble falling asleep, drowsiness, excessive/loss of sleep
Critical symptoms indicating severe injury requiring emergency transport: loss of consciousness >30 seconds, worsening headache, repeated vomiting, altered mental status, seizures, visual changes, or skull deformities 3, 2.
2. Cognitive Assessment - Standardized Assessment of Concussion (SAC)
Orientation (5 points): Ask specific questions about current details - what venue, which half/period, who scored last, what team played last game, did your team win last game 2.
Immediate Memory (15 points): Read a 10-word list (not 5-word, which has ceiling effects) three times, athlete recalls as many words as possible after each trial in any order 5, 1.
Concentration (5 points):
- Digits backward: Read number strings, athlete repeats in reverse order (e.g., "7-1-9" becomes "9-1-7")
- Months in reverse order: December through January 2
Delayed Recall (5 points): After completing other tests, athlete recalls the original 10-word list 2.
3. Balance Examination - Modified Balance Error Scoring System
Remove shoes and ankle taping. Perform three 20-second stances with hands on hips, eyes closed 2:
- Double leg stance: feet together on firm surface
- Single leg stance: standing on non-dominant foot
- Tandem stance: heel-to-toe position
Count errors: opening eyes, lifting hands off hips, stepping/stumbling, remaining out of position >5 seconds 2.
4. Tandem Gait Testing
Timed Tandem Gait (TTG): Athlete walks heel-to-toe in straight line as quickly as possible while maintaining balance 6, 7.
Dual-Task Tandem Gait (DTTG): Same task while performing cognitive task (e.g., reciting months backward) 6.
Critical Interpretation Points
The SCAT-6 has maximal discriminatory ability within 72 hours of injury, with utility diminishing by day 7 1. It is NOT designed for return-to-play decisions beyond the acute phase 1.
Key Diagnostic Indicators:
- Any symptom increase from baseline warrants removal from play 4
- 2-point decline in concentration scores represents reliable change 8
- Mental fogginess is a strong predictor of prolonged recovery 2
- Retrograde and anterograde amnesia indicate more serious injury 2
Age-Specific Considerations
For ages 13+: Use standard SCAT-6 6
For ages 8-12: Use Child SCAT-6 with developmentally appropriate modifications 4, 6
For ages 5-9: Consider VOMS-Child (VOMS-C) with binary symptom reporting instead 9
Common Pitfalls to Avoid
- Don't rely on loss of consciousness - it occurs in <10% of concussions 2
- Don't use standard orientation questions alone (time, place, person) - they are unreliable compared to memory assessment 10
- Don't test immediately after exercise - wait >15 minutes to avoid confounding from exertion 2
- Don't ignore baseline symptoms - athletes with ADHD or depression may have pre-existing symptoms that must be factored into interpretation 2
- Don't assume normal imaging rules out concussion - CT/MRI are typically normal with concussion 2
Post-Assessment Management
If concussion is confirmed or suspected:
- Remove from play entirely that day 10
- Monitor for deterioration over several hours 10
- Ensure medical evaluation by experienced healthcare professional 2
- Begin active rehabilitation with sub-symptom threshold aerobic exercise within 2-10 days 6
- Avoid strict "cocooning" rest, which delays recovery 6
Cervical spine precautions: Assume spinal injury in any unconscious athlete until proven otherwise - maintain cervical stabilization until neurologic function is confirmed intact in all limbs and no neck pain/tenderness exists 2.