Table 3.
Association Between Recent Receptive Syringe Sharing, Opioid Agonist Therapy, and Enrollment Year After Adjusting for Biological Sex, Age, and City (n = 1137)
| Variable | Adjusted HR (95% CI) |
|---|---|
| City | |
| Amsterdam | … |
| Sydney | … |
| Montreal | … |
| San Francisco | … |
| Baltimore | … |
| Biological sex | |
| Female | 1.15 (.88–1.50) |
| Unknown | … |
| Age at enrollment (per 1-y increase) | 0.98 (.96–1.00) |
| Recent receptive syringe sharing | |
| Yes | 1.53 (1.19–1.97) |
| Unknown | 1.17 (.43–3.23) |
| Recent OAT, including methadone and buprenorphine | |
| Yes | 0.50 (.36–.70) |
| Unknown | 2.18 (1.40–3.42) |
| Enrollment year (per 3-y increase) | 0.72 (.62–.83) |
Boldface text indicates P ≤ .05. Stratified Cox models satisfied proportional hazards assumptions. Model stratified by city to allow a unique baseline hazard by city.
Abbreviations: CI, confidence interval; HR, hazard ratio; OAT, opioid agonist therapy.