Table 2.

Univariate and multivariate^† Cox proportional hazard analyses of the time to HCV infection among 390 injection drug users.

	Unadjusted Relative Hazard (RH)			Adjusted** Relative Hazard (RH)
Variable	RH	(95% CI)	p-value	RH	(95% CI)	p-value
Housing*
(unstable vs. stable)	1.71	(1.22 – 2.39)	0.002	1.47	(1.02 – 2.13)	0.041
Syringe sharing*
(yes vs. no)	1.84	(1.27 – 2.65)	0.001	1.57	(1.08 – 2.29)	0.020
Heroin injection*
(daily vs. not daily)	2.00	(1.44 – 2.79)	<0.001	1.61	(1.13 – 2.28)	0.008
Cocaine injection*
(daily vs. not daily)	1.95	(1.34 – 2.84)	< 0.001	1.48	(1.00 – 2.19)	0.049

†Only significant variables are shown above. Model was adjusted for initial cohort of recruitment (p > 0.05) and all variables significant in unadjusted analyses: gender, sex-trade, DTES residence (all p > 0.05 after adjustment). *Data were time-updated semi-annually and behaviors refer to activities in the last six months.