Injuries before and after index injury in the concussion and the control groups divided depending on sport participation
| Index injury | Injury before index injury | Injury after index injury | Injury before per index case | Injury after per index case | ||
|---|---|---|---|---|---|---|
| Ice hockey | Concussion | 71 | 33 | 32 | 0.46 | 0.45 |
| Control | 42 | 10 | 14 | 0.24 | 0.33 | |
| Football (soccer) | Concussion | 158 | 57 | 48 | 0.36 | 0.3 |
| Control | 773 | 149 | 160 | 0.19 | 0.21 | |
| Floorball | Concussion | 45 | 10 | 9 | 0.22 | 0.2 |
| Control | 400 | 44 | 51 | 0.11 | 0.13 | |
| Handball | Concussion | 7 | 3 | 4 | 0.43 | 0.57 |
| Control | 44 | 11 | 11 | 0.25 | 0.25 |
In addition, a significantly higher risk for injury, both before and after concussion, compared with ankle injury (control group), was found both in men (p=0.001 and 0.007) and women (p=0.002 and 0.016; table 4).