Table 4 HCV multivariate adjusted OR and 95% CI.

Years of injection drug use

Categories based on quartiles (Q1–Q4 below)

Q2 vs. Q1

3.1 (1.5–6.2)

0.002

Q3 vs. Q1

10.8 (4.8–24.5)

<0.001

Q4 vs. Q1

10.3 (4.7–22.6)

<0.001

injected at a shooting gallery

Yes vs. no

4.3 (1.8–10.5)

<0.001

Ever used someone else's used syringe

See table 5

Number of IDU in network who use talwin/ritalin

See table 5

Number of IDU in network who have shown respondent how to inject drugs

See table 5