Table 2.

Cox proportional hazards model of time to first suicide attempt among a cohort of injection drug users in Vancouver, 2001–2008 (n = 1873).

Characteristic	Unadjusted HR* (95% CI)	P – value	Adjusted HR* (95% CI)	P – value
Age (per year older)	0.96 (0.95 – 0.98)	<0.01	0.98 (0.96 – 1.00)	0.05
Sex (female vs. male)	1.59 (1.15 – 2.19)	0.01	1.32 (0.91 – 1.92)	0.15
Ethnicity (Aboriginal ancestry vs. other)	1.59 (1.15 – 2.19)	0.01	1.36 (0.93 – 1.97)	0.11
Sexual Orientation (LGBTa vs. heterosexual)	1.55 (0.95 – 2.54)	0.08
Relationships Status (married vs. single/dating)	1.14 (0.76 – 1.69)	0.53
Homeless† (yes vs. no)	1.74 (1.17 – 2.59)	0.01	1.22 (0.79 – 1.87)	0.37
Non-injection Crack Use† (yes vs. no)	1.61 (1.09 – 2.38)	0.02	1.28 (0.79 – 1.87)	0.21
Injection Heroin Use† (yes vs. no)	1.47 (1.01 – 2.16)	0.04	1.16 (0.78 – 1.71)	0.46
Injection Cocaine Use† (yes vs. no)	1.54 (1.07 – 2.23)	0.02	1.29 (0.87 – 1.92)	0.21
Injection Methamphetamine Use† (yes vs. no)	2.15 (1.32 – 3.49)	<0.01	1.80 (1.08 – 2.99)	0.02
Non-injection Methamphetamine Use† (yes vs. no)	1.48 (0.69 – 3.17)	0.32
Incarceration† (yes vs. no)	1.13 (0.71 – 1.78)	0.61
Methadone Maintenance Therapy‡ (yes vs. no)	0.81 (0.56 – 1.17)	0.26
Experience Physical Violence† (yes vs. no)	1.54 (1.04 – 2.28)	0.03	1.38 (0.92 – 2.06)	0.12
Sex Trade Work† (yes vs. no)	1.46 (0.94 – 2.26)	0.09

Note:

^*HR = Hazard Ratio; a LGBT = lesbian, gay, bisexual, transgender/transsexual;

^†refers to activities in the past 6 months;

^‡refers to current experiences.