Table 3.

Odds ratios (OR) and 95% confidence intervals (CI) of HIV infection among all female sex workers and according to location of sex work in higher or lower risk venues.^*

Potential risk factors	All FSWs (N= 737) OR (95% CI)†	FSWs at Higher Risk Venues (N=279) OR (95% CI)†	FSWs at Lower Risk Venues (N=458) OR (95% CI)†
Injection drug user (vs. non-drug user)	9.1 (4.67–17.55)	10.2 (4.35–23.73)	6.9 (2.06–23.18)
Non-injection illegal drug user (vs. non-drug user)	3.3 (1.46–7.37)	4.9 (1.74–13.72)
Duration of commercial sex work ≥5 years (compared to duration <1 year)	2.7 (1.25–5.93)	5.2 (1.68–15.87)
Duration of commercial sex work 1~5 years (compared to duration <1 year)	1.1 (0.52–2.11)	1.4 (0.51–4.02)
HSV-2 antibody positive (vs. negative)	2.2 (1.05–4.70)
Higher risk (vs. lower risk) venue for sex work	2.0 (1.12–3.47)	-	-
Vaginal douching (yes vs. no)		3.8 (1.06–13.68)
100% condom use with client in previous week (vs. not)			0.3 (0.12–0.90)
History of blood transfusion (yes vs. no)			4.7 (1.17–19.15)
T. vaginalis infection (yes vs. no)			4.4 (1.57–12.13)

^*The following potential risk factors or confounders were statistically significant in the univariate analyses but not in multivariate models: age, permanent residence in Kaiyuan, residence type (i.e. family home, apartment, etc.), 100% condom use with regular sex partner in previous week, number of clients in previous week, and tattoo.

^†Odds ratios and 95% confidence intervals adjusted for the potential risk factors that were statistically significant in the three different logistic models.