Table 4.
Univariate and multivariate logistic regression analysis of factors associated with HIV infectiona.
| Variables | Using Internet MSM (N = 1000) | Non-Internet MSM (N = 981) | ||||
|---|---|---|---|---|---|---|
| HIV prevalence (%) | cOR (95% CI) | aOR (95% CI) | HIV prevalence (%) | cOR (95% CI) | aOR (95% CI) | |
| Age | ||||||
| ≤25 years | 11.0 (66/600) | Ref | 9.5 (40/422) | Ref | ||
| >25 years | 16.5 (66/400) | 1.6 (1.1–2.3)∗ | NA | 11.3 (63/559) | 1.2 (0.8–1.8) | NA |
| Monthly income | ||||||
| None | 10.3 (33/321) | Ref | 8.7 (19/219) | Ref | ||
| 1–300 $ | 13.1 (42/321) | 1.3 (0.8–2.1) | NA | 10.6 (51/480) | 1.3 (0.7–2.2) | NA |
| >300 $ | 15.9 (57/358) | 1.7 (1.1–2.6)∗ | NA | 11.7 (33/282) | 1.4 (0.8–2.5) | NA |
| Education level | ||||||
| Junior high school and below | 14.8 (34/229) | Ref | 10.2 (55/539) | Ref | ||
| Senior high school and above | 12.7 (98/771) | 0.8 (0.5–1.3) | NA | 10.9 (48/442) | 1.1 (0.7–1.6) | NA |
| Residence place | ||||||
| Shenyang | 9.0 (33/367) | Ref | Ref | 10.6 (29/273) | Ref | Ref |
| Other cities | 15.6 (99/633) | 1.9 (1.2–2.9)∗∗ | 1.9 (1.3–2.9)∗∗ | 10.5 (74/708) | 1.0 (0.6–1.6) | 1.0 (0.6–1.6) |
| Ethnicity | ||||||
| Non-Han | 11.5 (17/148) | Ref | Ref | 11.8 (19/161) | Ref | Ref |
| Han | 13.5 (115/852) | 1.2 (0.7–2.1) | 1.2 (0.7–2.1) | 10.2 (84/820) | 0.9 (0.5–1.4) | 0.8 (0.5–1.4) |
| Marriage status | ||||||
| Single | 12.5 (102/819) | Ref | Ref | 8.7 (56/645) | Ref | Ref |
| Others | 16.6 (30/181) | 1.4 (0.9–2.2) | 1.2 (0.7–1.9) | 14.0 (47/336) | 1.7 (1.1–2.6)∗ | 1.7 (1.1–2.5)∗ |
| Sexual orientation | ||||||
| Bisexual orientation | 12.5 (35/281) | Ref | Ref | 8.5 (31/366) | Ref | Ref |
| Homosexual orientation | 13.6 (96/704) | 1.1 (0.7–1.7) | 1.2 (0.8–1.9) | 12.0 (70/584) | 1.5 (1.0–2.3) | 1.5 (1.0–2.4) |
| Heterosexual or not sure | 6.7 (1/15) | 0.5 (0.1–3.9) | 0.5 (0.1–4.1) | 6.5 (2/31) | 0.7 (0.2–3.3) | 0.7 (0.2–3.2) |
| Age of male sexual behavior debut | ||||||
| <18 years | 12.7 (29/229) | Ref | Ref | 13.5 (21/155) | Ref | Ref |
| 18–25 years | 12.1 (82/678) | 1.0 (0.6–1.5) | 0.9 (0.6–1.4) | 8.9 (53/598) | 0.6 (0.4–1.1) | 0.6 (0.4–1.0) |
| >25 years | 22.2 (20/90) | 2.0 (1.1–3.7)∗ | 1.5 (0.8–3.1) | 13.3 (29/218) | 1.0 (0.5–1.8) | 0.9 (0.5–1.8) |
| Condom use with steady male sex partners in the past year | ||||||
| Always use | 9.3 (25/268) | Ref | Ref | 5.4 (11/205) | Ref | Ref |
| Occasionally or never use | 16.2 (60/371) | 1.9 (1.1–3.1)∗ | 1.9 (1.2–3.1)∗ | 14.0 (54/385) | 2.9 (1.5–5.6)∗∗ | 3.0 (1.5–5.9)∗∗∗ |
| Condom use with casual male sex partners in the past year | ||||||
| Always use | 11.1 (47/425) | Ref | Ref | 9.2 (27/294) | Ref | Ref |
| Occasionally or never use | 16.7 (64/384) | 1.6 (1.1–2.4)∗ | 1.7 (1.1–2.6)∗ | 12.2 (49/402) | 1.4 (0.8–2.3) | 1.4 (0.9–2.4) |
| Preferred intercourse sexual roles with male partners | ||||||
| Insertive anal sexual role | 8.5 (25/295) | Ref | Ref | 6.8 (23/339) | Ref | Ref |
| Both insertive and receptive roles | 14.5 (72/495) | 1.8 (1.1–3.0)∗ | 2.0 (1.3–3.3)∗∗ | 13.7 (65/475) | 2.2 (1.3–3.6)∗∗ | 2.3 (1.4–3.8)∗∗∗ |
| Receptive anal sexual role | 17.2 (35/204) | 2.2 (1.3–3.9)∗∗ | 2.5 (1.5–4.5)∗∗∗ | 9.5 (14/148) | 1.4 (0.7–2.9) | 1.5 (0.7–3.1) |
| Number of male sexual partners in the past year | ||||||
| >10 | 11.8 (32/272) | Ref | Ref | 8.7 (27/311) | Ref | Ref |
| 4–10 | 15.5 (53/343) | 1.4 (0.9–2.2) | 1.4 (0.9–2.3) | 11.1 (33/296) | 1.3 (0.8–2.3) | 1.3 (0.8–2.2) |
| 0–3 | 12.2 (47/385) | 1.0 (0.7–1.7) | 1.1 (0.7–1.7) | 11.5 (43/374) | 1.4 (0.8–2.3) | 1.3 (0.8–2.3) |
| STD symptoms in the past year | ||||||
| No | 12.9 (122/946) | Ref | Ref | 10.3 (97/946) | Ref | Ref |
| Yes | 18.5 (10/54) | 1.5 (0.8–3.1) | 1.5 (0.7–3.0) | 17.1 (6/35) | 1.8 (0.7–4.5) | 1.8 (0.7–4.4) |
| Syphilis infection | ||||||
| Negative | 10.5 (93/886) | Ref | Ref | 8.0 (69/863) | Ref | Ref |
| Positive | 34.2 (39/114) | 4.4 (2.9–6.9)∗∗∗ | 4.3 (2.8–6.7)∗∗∗ | 28.8 (34/118) | 4.7 (2.9–7.4)∗∗∗ | 4.7 (2.9–7.5)∗∗∗ |
a: adjusted for age, monthly income, and education level. cOR: crude odds ratio. aOR: adjusted odds ratio. ∗ p < 0.05, ∗∗ p < 0.01, ∗∗∗ p < 0.001. NA, not applicable.