Table 5.
Results From Multivariate Survival Models of Suicide in Subjects With Repeated Traumatic Brain Injuries in Different Age Groups, Quebec, Canada, 1987–2008
| Predictor | HRa | 95% CI | P Value |
|---|---|---|---|
| Age group with repeated TBIs, years | |||
| <12 | 1.23 | 0.98, 1.56 | 0.074 |
| 12–17 | 1.41 | 1.12, 1.78 | <0.010 |
| ≥18 | 1.61 | 1.44, 1.80 | <0.001 |
| No TBI | 1.00 | Referent | Referent |
| Probable TBI | |||
| Yes | 1.12 | 0.93, 1.36 | 0.240 |
| No | 1.00 | Referent | Referent |
| Musculoskeletal injury | |||
| Yes | 1.44 | 1.21, 1.74 | <0.001 |
| No | 1.00 | Referent | Referent |
| Sex | |||
| Male | 4.96 | 3.79, 6.47 | <0.001 |
| Female | 1.00 | Referent | Referent |
| Mental disorders before first TBI | |||
| Yes | 3.28 | 2.73, 3.95 | <0.001 |
| No | 1.00 | Referent | Referent |
Abbreviations: CI, confidence interval; HR, hazard ratio; TBI, traumatic brain injury.
a Adjusted for demographic characteristics and other injuries.