Table 3.

Results From Multivariate Survival Models of Suicide by Age Group, Quebec, Canada, 1987–2008

Predictor	HRa	95% CI	P Value
Age at TBI, years
<12	1.49	1.04, 2.14	0.032
12–17	1.57	1.09, 2.26	0.015
≥18	2.53	1.79, 3.59	<0.001
No TBI	1.00	Referent	Referent
Age at probable TBI, years
<12	0.77	0.62, 0.95	0.016
12–17	1.19	0.96, 1.48	0.110
≥18	1.64	1.25, 2.15	<0.001
No probable TBI	1.00	Referent	Referent
Age at musculoskeletal injury, years
<12	0.95	0.75, 1.21	0.680
12–17	1.17	0.96, 1.47	0.110
≥18	1.77	1.38, 2.27	<0.001
No musculoskeletal injury	1.00	Referent	Referent
Sex
Male	4.69	3.59, 6.13	<0.001
Female	1.00	Referent	Referent
Mental health disorders before first TBI
Yes	3.45	2.86, 4.17	<0.001
No	1.00	Referent	Referent

Abbreviations: CI, confidence interval; HR, hazard ratio; TBI, traumatic brain injury.

^a Adjusted for demographic characteristics, mental disorders before first TBI, and other injuries.