Multivariate analysis of risk factors for HIV among men who have sex with men*
| N (%) | HIV Prevalence | Crude OR (95% CI) | Adjusted OR (95% CI) | p Value | |||
| Lagos state | |||||||
| Age, years | <25 | 214 (73.7) | 12.6 (8.0–19.3) | ||||
| ≥25 | 77 (26.3) | 31.7 (21.0–44.8) | 3.2 (1.5 to 6.9) | 5.6 (2.2 to 14.1) | <0.001 | ||
| Had been the receptive partner in anal sex in the past 6 months | No | 117 (43.3) | 6.5 (3.0–13.5) | ||||
| Yes | 154 (56.7) | 24.3 (17.0–33.5) | 4.6 (1.8 to 11.8) | 4.2 (1.5 to 12.3) | 0.008 | ||
| Feels at risk of HIV | No | 161 (56.8) | 11.4 (7.1–17.8) | ||||
| Yes | 122 (43.2) | 24.1 (15.9–34.8) | 2.5 (1.2 to 5.1) | 4.4 (1.6 to 12.1) | 0.004 | ||
| Education | Not completed secondary | 28 (9.4) | 21.6 (0.1–41.4) | ||||
| Completed secondary | 261 (90.6) | 17.2 (0.1–23.6) | 1.0 (0.5 to 2.1) | 1.0 (0.5 to 2.1) | 0.900 | ||
| Cross River state | |||||||
| Age, years | <25 | 236 (81.8) | 0.53 (0.2–1.6) | ||||
| ≥25 | 53 (18.2) | 2.83 (0.9–8.9) | 5.5 (1.1 to 28.1) | 5.8 (0.8 to 44.2) | 0.088 | ||
| Had been the receptive partner in anal sex in the past 6 months | No | 35 (12.2) | 0.21 (0.0–1.5) | ||||
| Yes | 251 (87.8) | 0.7 (0.3–1.8) | 3.8 (0.4 to 33.3) | † | † | ||
| Feels at risk of HIV | No | 232 (80.4) | 0.9 (0.3–2.3) | ||||
| Yes | 52 (18.0) | 1.4 (0.3–5.9) | 1.0 (0.6 to 1.4) | 1.1 (0.7 to 1.7) | 0.598 | ||
| Education | Not completed secondary | 23 (7.9) | 0.0 | ||||
| Completed secondary | 265 (92.1) | 1.0 (0.5–2.3) | 0.8 (0.1 to 4.6) | 1.0 (0.2 to 4.5) | 0.996 | ||
| Kano state | |||||||
| Age, years | < 25 | 158 (68.6) | 8.8 (3.6–19.9) | ||||
| >=25 | 73 (31.4) | 16.6 (6.2–37.5) | 2.1 (0.5 to 8.9) | 6.5 (1.6 to 27.1) | 0.010 | ||
| Had been the receptive partner in anal sex in the past 6 months | No | 45 (15.5) | 5.3 (0.6–17.7) | ||||
| Yes | 246 (84.5) | 13.0 (8.6–18.6) | 3.4 (0.7 to 18.2) | 2.9 (0.5 to 17.0) | 0.237 | ||
| Feels at risk of HIV | No | 143 (64.2) | 14.6 (6.7–28.8) | ||||
| Yes | 73 (31.4) | 3.6 (1.4–8.9) | 0.2 (0.1 to 0.8) | 0.1 (0.0 to 0.8) | 0.028 | ||
| Education | Not completed secondary | 135 (42.6) | 16.1 (7.3–31.9) | ||||
| Completed secondary | 158 (57.4) | 7.6 (2.3–21.9) | 0.4 (0.1 to 1.9) | 0.5 (0.3 to 0.7) | <0.001 | ||
↵* The variables age, being a receptive partner, feeling at risk of HIV and education presented in this table are only a selection from those in the multivariate model; the full model is available as an online supplementary table.
↵† variable (and associated observations) dropped in the multivariate analysis as it perfectly predicts the HIV result.