| Univariate (95 % CI) | P value | Adjusted OR (95 % CI) | P value |
---|---|---|---|---|
Age | Â | 0.123* | Â | Â |
 ≤24 | 1 |  | 1 |  |
 25–34 | 1.61 (0.82–3.19) | 0.170 | 1.59 (0.73–3.47) | 0.240 |
 35–44 | 1.52 (0.74–3.14) | 0.258 | 1.38 (0.62–3.07) | 0.428 |
 ≥45 | 2.14 (0.93–4.91) | 0.074 | 3.60 (1.34–9.64) | 0.011 |
Marital status | Â | Â | Â | Â |
 Unmarried | 1 |  |  |  |
 Married | 1.53 (0.94–2.49) | 0.086 |  |  |
 Divorced/widowed | 1.40 (0.54–3.65) | 0.488 |  |  |
Education | Â | 0.005* | Â | Â |
 Junior high school and below | 1 |  |  |  |
 Senior high school | 0.80 (0.47–1.37) | 0.420 |  |  |
 College and above | 0.38 (0.17–0.87) | 0.022 |  |  |
 Income per month |  | 0.520* |  |  |
 <3000 | 1 |  | 1 |  |
 3000–3999 | 1.69 (1.00–2.85) | 0.052 | 1.96 (1.67–3.60) | 0.031 |
 ≥4000 | 0.69 (0.37–1.31) | 0.259 | 0.84 (0.41–1.70) | 0.621 |
Years for residing in Wenzhou | Â | 0.014* | Â | Â |
 <1 | 1 |  |  |  |
 1–3 | 1.06 (0.58–1.95) | 0.922 |  |  |
 4–10 | 0.69 (0.37–1.29) | 0.244 |  |  |
 >10 | 0.41 (0.18–0.89) | 0.025 |  |  |
Number of anal sex partner during previous half year | Â | Â | Â | |
 0–1 | 1 |  | 1 |  |
 ≥2 | 1.96 (1.22–3.14) | 0.005 | 1.93 (1.15–3.24) | 0.012 |
Anal sex with a regular partner | Â | Â | Â | Â |
 No | 1 |  |  |  |
 Yes | 0.65 (0.41–1.04) | 0.073 |  |  |
Anal sex after using drugs during previous half year | Â | Â | Â | |
 No | 1 |  |  |  |
 Yes | 3.05 (0.99–9.37) | 0.051 |  |  |
Number of oral sex partner during previous half year | Â | Â | Â | |
 0–1 | 1 |  |  |  |
 ≥2 | 1.74 (1.90–2.78) | 0.020 |  |  |
Oral sex with a casual partner during previous half year | Â | Â | Â | |
 No | 1 |  |  |  |
 Yes | 1.62 (1.01–2.61) | 0.047 |  |  |
Risk perception for HIV | Â | 0.001* | Â | Â |
 Impossible | 1 |  | 1 |  |
 Somewhat possible | 1.70 (1.00–2.87) | 0.049 | 1.44 (0.81–2.55) | 0.218 |
 Possible | 2.86 (1.49–5.47) | 0.002 | 3.18 (1.56–6.48) | 0.001 |
Exposure to HIV prevention during the past year | Â | Â | Â | |
 No | 1 |  |  |  |
 Yes | 0.67 (0.42–1.07) | 0.095 |  |  |
Present Syphilis Infection | Â | Â | Â | Â |
 No | 1 |  | 1 |  |
 Yes | 2.85 (1.45–5.62) | 0.002 | 3.01 (1.44–6.29) | 0.003 |