Inter-rater reliability and test–retest reliability
| Variables | Inter-rater reliability ICC2,1 (95% CI) | Test–retest reliability ICC3,2 (95% CI) |
| Symptom scale | ||
| Number of symptoms | 0.99 (0.99 to 1.00) | 0.64 (0.40 to 0.79) |
| Symptom severity score | 0.99 (0.99 to 1.00) | 0.53 (0.26 to 0.73) |
| SAC: total score | 0.98 (0.96 to 0.99) | 0.46 (0.17 to 0.68) |
| mBESS | ||
| Number of errors | 0.97 (0.94 to 0.99) | 0.39 (0.09 to 0.63) |
| Tandem gait | 0.96 (0.91 to 0.98) | 0.65 (0.42 to 0.80) |
| Coordination | 1.00 | 1.00 |
ICC, intraclass correlation coefficient; SAC, Standardized Assessment of Concussion; mBESS, modified Balance Error Scoring System.