Table 3.

Cox regression model: significant predictors of suicide attempt after traumatic brain injury

Variables	Adjusted HR* (95% CI)	P value
Depression	5.73 (4.14 to 7.93)	<0.001
Alcohol attributed disease	3.29 (2.30 to 4.72)	<0.001
Older age	0.83 (0.74 to 0.94)	0.002

The adjusted HR and 95% CI were estimated by a stepwise Cox proportional hazards regression method.

*Model adjusted for age, gender, income, urbanisation level and relevant comorbidities (hypertension, diabetes mellitus, hyperlipidaemia, coronary artery disease, congestive heart failure, liver cirrhosis, depression, tobacco use disorder and alcohol attributed disease).