Table 4.

Results From Multivariate Survival Models of Suicide According to Severity of Traumatic Brain Injury, Quebec, Canada, 1987–2008

Predictor	HRa	95% CI	P Value
TBI severity
High	2.77	2.01, 3.83	<0.001
Low	2.18	1.63, 2.91	<0.001
No TBI	1.00	Referent	Referent
Probable TBI
Yes	1.24	1.03, 1.49	0.0250
No	1.00	Referent	Referent
Musculoskeletal injury
Yes	1.50	1.25, 1.81	<0.001
No	1.00	Referent	Referent
Sex
Male	4.82	3.69, 6.28	<0.001
Female	1.00	Referent	Referent
Age at inclusion, years
0–5	1.00	Referent	Referent
6–11	1.96	1.25, 2.15	<0.001
12–17	2.69	1.49, 2.64	<0.001
Mental disorders before first TBI
Yes	3.85	3.18, 4.68	<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.