Risk of injury after concussion (n=66) or randomly selected injury (n=1599) in the year after the index trauma, divided into different time periods
| At least one injury (n=874) | At least one sudden onset injury (n=709) | At least one gradual onset injury (n=414) | ||||
|---|---|---|---|---|---|---|
| HR | 95% CI | HR | 95% CI | HR | 95% CI | |
| 0 to <3 months | 1.56 | 1.09 to 2.23 | 1.76 | 1.12 to 2.76 | 2.44 | 1.36 to 4.37 |
| 3 to <6 months | 2.78 | 1.58 to 4.89 | 3.00 | 1.52 to 5.92 | 4.36 | 1.57 to 12.10 |
| 6 to 12 months | 4.07 | 2.14 to 7.76 | 3.69 | 1.72 to 7.95 | 7.94 | 2.39 to 26.44 |
Hazards were adjusted for the number of injuries in the year before the index injury.