Change in SCAT5 components from baseline to acute evaluation among concussed and control players
| Concussed | Control | ||||||||||||
| Mean | SD | Median | Median 95% CI | Range | Mean | SD | Median | Median 95% CI | Range | Z | Sig. | AUC | |
| Symptom severity | −17.03 | 15.18 | −12 | −15.5 to −10 | −76–3 | −4.79 | 8.38 | -2 | −3 to 1 | −39–14 | 9.34 | <0.001 | 0.806 (0.757 to 0.854) |
| Symptom total | −7.09 | 5.00 | −6.5 | −7 to −6 | −20–4 | −2.59 | 4.16 | -1 | −2 to 1 | −19–12 | 8.37 | <0.001 | 0.773 (0.721 to 0.826) |
| Corrected immediate memory | −2.04 | 4.07 | -2 | −3 to −1 | −14–7 | −0.25 | 3.47 | -1 | −1 to 0 | −9–11 | 3.72 | <0.001 | 0.622 (0.559 to 0.685) |
| Delayed recall Z-score | −0.69 | 1.53 | −0.55 | −0.60 to 0 | −5.23–3.49 | −0.20 | 1.13 | 0 | −0.53 to 0 | −5.39–2.40 | 2.73 | 0.006 | 0.589 (0.525 to 0.653) |
| Concentration | −0.13 | 0.94 | 0 | 0 to 0 | −3–2 | 0.04 | 0.91 | 0 | 0 to 0 | −3–3 | 1.26 | 0.207 | 0.538 (0.473 to 0.602) |
| mBESS Total | −0.78 | 3.94 | 0 | −1 to 1 | −15–8 | −0.11 | 3.21 | 0 | 0 to 1 | −14–8 | 1.27 | 0.205 | 0.554 (0.469 to 0.638) |
mBESS difference scores were calculated from a reduced sample of Concussed (n=90) and Control (n=93) players who were tested barefoot (not wearing skates). Immediate memory was corrected for list differences by using raw scores. Delayed Recall scores were corrected for list differences using normative data. Negative scores represent more symptoms/worse performance from baseline to acute evaluation. Follow-up analysis of the digits component of the Concentration core was not significantly different between concussed players and Controls (Z=1.39, p=0.166, AUC=0.55, 95% CI 0.47 to 0.64). Median 95% CIs were created by bootstrapping 1000 samples.
AUC, Area Under the Curve; mBESS, Modified Balance Error Scoring System; SCAT, Sport Concussion Assessment Tool.