Percentage of subjects achieving each level of digits in digits backwards
| 0 (%) | 1 (%) | 2 (%) | 3 (%) | 4 (%) | 5 (%) | 6 (%) | |
| All (n = 247) | 5 | 0 | 0 | 8 | 13 | 23 | 51 |
| Men (n = 187) | 5 | 0 | 0 | 8 | 13 | 23 | 51 |
| Women (n = 60) | 8 | 0 | 0 | 3 | 10 | 21 | 56 |
| NC (n = 157) | 7 | 0 | 0 | 9 | 12 | 25 | 46 |
| PC (n = 90) | 2 | 0 | 0 | 6 | 12 | 19 | 61 |
NC, never concussed; PC, previously concussed.