Self-reported demographics from the impact test for each sport category
| Demographics | Collision sports (n=42 332) | Contact sports (n=37 074) | Non-contact sports (n=13 573) |
| Age (years) | 15.6±2.0 | 15.6±2.1 | 15.8±2.1 |
| Height (cm) | 174.2±8.6 | 173.0±9.9 | 173.2±9.7 |
| Weight (kg) | 72.3±16.3 | 64.9±13.9 | 64.2±14.2 |
| Concussion history (n, %) | 0: 33 083 (78) 1: 6549 (15) 2: 1922 (5) 3+: 777 (2) | 0: 31 241 (84) 1: 4233 (12) 2: 1087 (3) 3+: 512 (1) | 0: 12 065 (89) 1: 1138 (8) 2: 231 (2) 3+: 139 (1) |
| Learning problem (n,%) | 2141 (5) | 1241 (3) | 581 (4) |
| ADHD (n, %) | 5461 (13) | 3441 (9) | 1418 (10) |
| Psychiatric condition* (n/total, %) | 1596/38 956 (4) | 1253/34 183 (4) | 658/12 669 (5) |
| Headaches* (n/total, %) | 4331/39 291 (11) | 3229/34 468 (9) | 1060/12 722 (8) |
| Migraines* (n/total, %) | 2725/39 048 (7) | 2027/34 251 (6) | 675/12 676 (5) |
| Speech therapy* (n/total, %) | 3101/42 315 (7) | 2375/37 059 (6) | 1105/13 569 (8) |
| Special education* (n/total, %) | 3103/42 315 (7) | 1873/37 058 (5) | 691/13 568 (5) |
| Repeated school year(s)* (n/total, %) | 3100/42 316 (7) | 1910/37 057 (5) | 557/13 569 (4) |
| Sport breakdown (% of total sports) | Football (31) Ice Hockey (9) Lacrosse (6) | Baseball (6) Basketball (10) Soccer (21) Wrestling (3) | Cross Country (4) Golf (2) Swimming (1) Tennis (2) Track and field (5) |
There were significant differences between all three sport types (p<0.001) across the demographics categories.
*Not all participants answered the questions regarding treatment for psychiatric conditions, headaches, migraines, speech therapy, special education, or repeating at least 1 year of school, so the reported number is out of fewer total participants than that given for each sport type. The number of total responses is bolded in those categories.