Table 3 Binary dependent variables measured repeatedly over the course of Aristotle (past 12 months: frequency of injecting drugs, receptive syringe sharing, dividing drugs with a syringe someone else had already used and condom use) regressed against covariates (Aristotle round and awareness of HIV status). Results from multivariable piecewise Generalized Estimating Equation analyses (Aristotle, 2012–2013, participants = 3320, observations = 7110, adjustment for gender, age, origin, homelessness, education, history of imprisonment, and history of Opioid Maintenance Treatment)
Awareness of HIV status | Injecting drugs at least once per day versus less than once per day | Dividing drugs at least half of the time the participant injected drugs with a syringe someone else had used before versus less than half of the time | Receptive syringe sharing at least half of the time the participant injected drugs versus receptive sharing less than half of times | Condom use “always” or “usually yes” versus “usually no” or “never” | |
|---|---|---|---|---|---|
Females | Males | ||||
Round B vs. Round A | OR (95% CI) | ||||
HIV (+) aware (AHS) | 0.34 (0.19, 0.61) | 0.10 (0.04, 0.23) | 0.53 (0.31, 0.91) | 0.92 (0.25, 3.35) | 1.65 (0.78, 3.50) |
HIV (+) unaware (UHS) | 0.37 (0.25, 0.57) | 0.37 (0.19, 0.72) | 0.67 (0.45, 0.99) | 0.62 (0.22, 1.79) | 1.35 (0.79, 2.29) |
HIV (−) | 0.37 (0.32, 0.42) | 0.48 (0.36, 0.64) | 0.75 (0.65, 0.86) | 1.40 (0.95, 2.05) | 0.99 (0.85, 1.17) |
Round B vs. Round E | |||||
HIV (+) aware (AHS) | 0.84 (0.74, 0.96) | 1.10 (0.81, 1.50) | 0.81 (0.71, 0.93) | 0.86 (0.64, 1.17) | 1.24 (1.01, 1.52) |
HIV (+) unaware (UHS) | 0.94 (0.76, 1.18) | 0.96 (0.64, 1.44) | 0.96 (0.77, 1.20) | 0.88 (0.50, 1.55) | 1.21 (0.88, 1.67) |
HIV (−) | 0.95 (0.90, 1.01) | 0.80 (0.70, 0.91) | 0.96 (0.91, 1.01) | 0.96 (0.85, 1.08) | 0.94 (0.89, 0.99) |