Table 1.
Prevalence of risk factors and association between these risk factors and HIV seroconversion (hazard ratio)
| Prevalence of behavior n (%)(1) | Number of HIV cases (person-years) |
Hazard ratio (95% CI) |
|
|---|---|---|---|
| No UAI | 521 (37) | 7 (2071.4) | 1 |
| UAI by reported HIV status of sexual partners(2) | |||
| UAI with HIV-negative only (serosorting) | 466 (33) | 14 (1958.7) | 2.17 (0.88,5.39) |
| UAI with some unknown HIV status | 362 (25) | 13 (879.8) | 4.44 (1.77,11.16) |
| UAI with any HIV-positive | 77 (5) | 13 (246.3) | 16.12 (6.42,40.46) |
| UAI by sexual position(2) | |||
| Insertive UAI only (strategic positioning) | 225 (16) | 4 (792.1) | 1.54 (0.45,5.26) |
| Receptive with withdrawal (withdrawal) | 204 (14) | 11 (662.0) | 5.00 (1.94,12.92) |
| Receptive with ejaculation | 426 (33) | 25 (1627.2) | 4.65 (2.01,10.76) |
| Circumcision status(3) | |||
| Uncircumcised men | 488 (34) | 17 (16.7) | 1.22 (0.67,2.22) |
| Number of sexual partners | |||
| 10+ casual sexual partners in the last 6 m | 528 (37%) | 20 (1370.8) | 2.1 (1.12-3.74) |
| STIs(4) | |||
| Anal warts between study visit | 59 (4) | 8 (197.1) | 5.22 (2.44,11.18), |
| Anal gonorrhoea at study visit | 4 (<1) | 3 (42.8) | 8.50 (2.60,27.95) |