Participant demographics
| No COVID-19 (n=72 092) | With COVID-19 (n=430) | |
| Age (years) | 17.1 (2.7) | 17.0 (1.9) |
| Gender (female), n (%) | 32 766 (45) | 202 (47) |
| Sport, n (%) | ||
| Collision | 29 558 (41) | 133 (31) |
| Field and court | 28 837 (40) | 198 (46) |
| Individual | 12 256 (17) | 86 (20) |
| Other | 1441 (2) | 13 (3) |
Results are reported as mean (SD) or count (percentage).