Table 3.
ImPACT Baseline Mean Composite Scores Under Supervised and Unsupervised Conditions
| Composite Score |
Group |
95% Confidence Interval |
P Value |
Cohen d |
|
| Supervised (n = 1070) |
Unsupervised (n = 1070) |
||||
| Verbal memory (SD) | 84.33 (10.21) | 84.11 (10.89) | −0.67, 1.11 | .59 | |
| Visual memory (SD) | 72.88 (13.53) | 73.03 (13.56) | −1.30, 1.00 | .79 | |
| Visual motor speed (SD) | 38.32 (7.60) | 37.42 (6.98) | 0.28, 1.52 | .004 | 0.12 |
| X's and O's (total number correct during interference) | 114.2 (10.81) | 112.9 (9.13) | 0.45, 2.15 | .003 | 0.13 |
| 3 letters (average counted correctly from countdown phase) | 16.03 (4.60) | 15.54 (4.32) | 0.11, 0.87 | .010 | 0.11 |
| Reaction time (SD) | 0.58 (0.10) | 0.60 (0.09) | −0.026, −0.014 | <.001 | 0.21 |
| X's and O's (average correct reaction time of interference stage) | 0.50 (0.10) | 0.51 (0.08) | −0.02, −0.002 | .008 | 0.11 |
| Symbol match (average correct reaction time) | 1.43 (0.39) | 1.51 (0.39) | −0.11, −0.05 | <.001 | 0.21 |
| Color match (average correct reaction time) | 0.76 (0.16) | 0.78 (0.16) | −0.03, −0.006 | <.001 | 0.13 |
| Impulse control (SD) | 6.96 (5.45) | 6.65 (5.62) | −0.16, 0.78 | .15 | |
| Total symptom score (SD) | 4.64 (8.65) | 4.50 (8.89) | −0.60, 0.88 | .69 | |
Abbreviation: ImPACT, Immediate Post-Concussion Assessment and Cognitive Testing.