Table 1.
Characteristics of the study sample
| N (%) | |
|---|---|
| Age1 | 16 (2.7) |
| Gender | |
| Male | 3415 (56.9) |
| Female | 2590 (43.1) |
| Sport (boys) | |
| Football | 1026 (30.0) |
| Soccer | 800 (23.4) |
| Basketball | 426 (12.5) |
| Ice hockey | 339 (10.0) |
| Lacrosse | 181 (5.3) |
| Track and field/cross country | 155 (4.5) |
| Wrestling | 122 (3.6) |
| Baseball | 97 (2.8) |
| Other | 269 (7.9) |
| Sport (girls) | |
| Soccer | 746 (28.8) |
| Field hockey | 434 (16.8) |
| Cheerleading | 312 (12.0) |
| Basketball | 275 (10.6) |
| Lacrosse | 196 (7.6) |
| Track and field/cross country | 143 (5.5) |
| Volleyball | 97 (3.8) |
| Ice hockey | 87 (3.4) |
| Swimming | 84 (3.2) |
| Softball | 75 (2.9) |
| Other | 141 (5.4) |
| Number of prior concussions | |
| 0 | 5121 (85.3) |
| 1 | 609 (10.1) |
| 2 | 174 (2.9) |
| 3 | 67 (1.1) |
| 4 or more | 34 (0.6) |
| History of learning problem | 722 (12.0) |
| No history of learning problem | 5283 (88.0) |
| Treatment for headache/migraine | 641 (10.7) |
| No treatment for headache/migraine | 4742 (79.0) |
| Missing | 622 (10.3) |
| Treatment for psychiatric condition | 315 (5.2) |
| No treatment for psychiatric condition | 4948 (82.4) |
| Missing | 742 (12.4) |
1
Data are mean (SD).