Table 2.
Composite scores by number of previous concussions
| Number of prior concussions | |||||
|---|---|---|---|---|---|
| 0 (n = 5121) | 1 (n = 609) | 2 (n = 174) | 3 (n = 67) | 4 or more (n = 34) | |
| Verbal memory | 84.1 (9.6) | 83.9 (9.8) | 83.1 (9.7) | 82.0 (10.9) | 83.3 (10.1) |
| Visual memory | 71.5 (13.2) | 71.9 (13.2) | 70.7 (13.5) | 69.4 (15.1) | 75.2 (13.2) |
| Reaction time | 0.60 (0.08) | 0.60 (0.08) | 0.60 (0.09) | 0.61 (0.08) | 0.60 (0.08) |
| Processing speed | 35.7 (7.6) | 35.4 (7.6) | 35.5 (8.6) | 34.7 (7.5) | 38.4 (7.5) |
| Impulse control | 7.5 (5.0) | 7.6 (5.0) | 8.9 (6.0) | 7.8 (5.2) | 8.5 (7.3) |
| Total symptom score | 5.1 (8.2) | 6.0 (9.6) | 7.9 (10.3) | 9.2 (12.3) | 10.6 (18.9) |