Table 2 Estimates of effect of MA use on injecting and sexually risk behaviors in matched and unmatched samples by logistic regression model among PWID, Tehran, 2016–2017
Outcome | Unmatched sample OR (CI 95%) | Matched sample OR (CI 95%) |
|---|---|---|
Condomless sex | ||
 MA users  MA non-users | 2.85; 95% CI 1.57–4.17 1 | 1.82; 95% CI 1.51–4.10 1 |
Receptive syringe sharing in past month | ||
 MA users  MA non-users | 1.66 (1.41–1.91) 1 | 1.36 (1.11–1.85) 1 |
Distributive syringe sharing in past month | ||
 MA users  MA non-users | 1.51 (1.34–1.86) 1 | 1.35 (1.15–1.81) 1 |