A - 29 The Test–Retest Reliability of the Sport Concussion Assessment Tool 6 (SCAT6)

Abstract Purpose To evaluate the reliability of the SCAT6 in healthy college students. Method Healthy college students (N = 27[81% female]) who were on average 21.0 ± 0.96 years old completed the SCAT6 Symptom Evaluation (SE), Standardized Assessment of Concussion (SAC [10-Word Immediate (IR) and Delayed Recall (DR), Concentration Domains]) modified and full Balance Error Scoring System (mBESS and BESS, respectively), Timed Tandem Gait (TTG), and Dual Task (DT) at two visits separated by a one-week. ​​Intraclass correlation coefficients (ICC(3,k)) were used to calculate the reliability of each SCAT6 outcome score. Paired t-tests were used to evaluate performance between Visits 1 and 2. An ICC value >0.75 was considered acceptable for clinical use. All analyses were performed with α = 0.05. Results The SE (ICC = 0.98[95% CI, 0.96–0.99]), mBESS (0.78[95% CI,0.51–0.90]), BESS (0.82[95% CI,0.60–0.92]), TTG (0.90[95% CI,0.77–0.95]), and DT (0.78[95% CI,0.52–0.90]) reliability ranged from good to excellent. The SAC’s 10-Word IR (ICC = 0.61[95% CI, 0.17–0.82]), Concentration (0.63[95% CI, 0.21–0.83]), DR (0.80[95% CI, 0.55–0.91]), and Total Cognitive Score (TCS[0.73(0.42–0.88)] had variable reliability. Participants performed similarly between Visits 1 and 2 for all SCAT6 outcome scores (all p > 0.05). Conclusions The SCAT6 SE, mBESS, BESS, TTG, and DT had acceptable reliability for clinical utility; however the SAC did not.