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. Author manuscript; available in PMC: 2016 Oct 7.
Published in final edited form as: Subst Use Misuse. 2015 Oct 7;50(10):1351–1359. doi: 10.3109/10826084.2015.1013132

Table 3.

Adjusted association of most likely class membership with demographics, sex behaviors, and drug use behaviors among PWID in Tijuana (n = 1,025)

Model 1 Model 2: Adjusting for Homophily

Methamphetamine + Heroin Use vs. Predominately Heroin Use Methamphetamine + Cocaine + Heroin Use vs. Predominately Heroin Use Methamphetamine + Heroin Use vs. Predominately Heroin Use Methamphetamine + Cocaine + Heroin Use vs. Predominately Heroin Use

AOR 95% CI AOR 95% CI AOR 95% CI AOR 95% CI
Age 0.97 0.94–0.99 1.02 0.98–1.07 0.97 0.95–0.98 1.01 0.97–1.05
Female 1.89 1.24–2.99 1.30 0.52–2.94 1.81 1.31–2.49 1.25 0.75–2.08
Income ≥ 3500 pesos/month 0.62 0.48–0.83 0.70 0.41–1.30 0.65 0.47–0.89 0.75 0.51–1.08
Sex exchange 0.80 0.48–1.30 2.64 1.09–5.44 0.86 0.52–1.42 2.87 1.75–4.73
2+ casual sex partners 0.59 0.27–1.37 12.96 1.78–36.45 0.63 0.35–1.16 12.54 3.48–45.23
Drug use before sex 2.25 1.03–4.55 0.24 0.09–2.02 2.26 1.56–3.27 0.28 0.07–1.08
Daily+ heroin injection 0.85 0.52–1.43 0.39 0.18–0.95 0.86 0.56–1.31 0.41 0.21–0.81
Years injecting 1.00 0.97–1.02 1.01 0.96–1.04 0.99 0.98–1.01 1.01 0.97–1.05
Overdose 1.59 0.89–2.78 3.33 1.52–8.36 1.7 0.92–3.13 3.55 1.32–9.55
Receptive sharing 2.67 1.98–3.51 2.36 1.31–4.44 2.63 2.17–3.18 2.46 1.30–4.65
Recruiter class 2 (dummy) -- -- -- -- 0.34 0.23–0.62 0.29 0.16–0.53
Recruiter class 3 (dummy) -- -- -- -- 0.38 0.18–0.66 0.18 0.08–0.38

PWID: People Who Inject Drugs

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