The odds and OR for an athlete to be injured 24 months before and after an index injury in the concussion and control groups
| Number of individuals with 1 or 2 or more injuries before or after the concussion | ||||||
|---|---|---|---|---|---|---|
| Group | Time | Total injuries (n) | Uninjured individuals (n) | Injured individuals (n) | n=1 | n>1 |
| Concussion (n=281) | Before | 103 | 211 | 70 | 48 | 22 |
| Odds 0.33 | Odds 0.46 | |||||
| OR 1.98 | OR 2.39 | |||||
| After | 93 | 215 | 66 | 44 | 22 | |
| Odds 0. 31 | Odds 0.50 | |||||
| OR 1.72 | OR 2.14 | |||||
| Control (ankle injury) (n=1259) | Before | 214 | 1079 | 180 | 151 | 29 |
| Odds 0.17 | Odds 0.19 | |||||
| After | 236 | 1069 | 190 | 154 | 36 | |
| Odds 0.18 | Odds 0.23 | |||||
Odds and OR are calculated by comparison with the number of athletes without injury during the same period of time.
The pattern of a higher risk for injury both before and after concussion was seen in all four sports (table 3).