Table 1.
Prevalence ratios assessing factors associated with anonymous partnerships (N=971 partnerships)
| Any anonymous partner in last 3 partnerships (N=84) | No anonymous partners in last 3 partnerships (N=311) | Overall | Participant Characteristics | ||||
|---|---|---|---|---|---|---|---|
| PR1 (95% CI) | P-value | aPR2 (95% CI) | P-value | ||||
| Age (years) | 31.8 (8.1) | 30.1 (9.6) | 30.5 (9.3) | 1.02 (0.99 to 1.04) | 0.14 | 1.02 (1.00 to 1.04) | 0.11 |
| Education (University or above vs. secondary or less) | 47 (55.6%) | 113 (36.5%) | 160 (40.6%) | 1.57 (0.99 to 2.48) | 0.054 | 1.58 (0.99 to 2.52) | 0.054 |
| Sexual orientation/ gender identity | |||||||
| Heterosexual | 6 (7.5%) | 17 (5.7%) | 23 (6.1%) | Ref | Ref | ||
| Bisexual | 19 (23.8%) | 47 (15.8%) | 66 (17.5%) | 1.21 (0.49 to 2.98) | 0.68 | 0.51 (0.19 to 1.40) | 0.20 |
| Homosexual | 47 (58.8%) | 188 (63.1%) | 235 (62.2%) | 0.77 (0.33 to 1.77) | 0.53 | 0.41 (0.14 to 1.25) | 0.12 |
| Transgender/travesti | 8 (10.0%) | 46 (15.4%) | 46 (15.4%) | 0.51 (0.17 to 1.52) | 0.23 | 0.39 (0.11 to 1.43) | 0.16 |
| Sexual Role | |||||||
| Activo | 10 (12.1%) | 57 (18.6%) | 67 (17.2%) | Ref | Ref | ||
| Pasivo | 18 (21.7%) | 123 (40.1%) | 141 (36.2%) | 0.55 (0.23 to 1.33) | 0.19 | 1.53 (0.61 to 3.83) | 0.37 |
| Moderno | 55 (66.3%) | 127 (41.4%) | 182 (46.7%) | 1.95 (0.97 to 3.93) | 0.06 | 5.40 (2.78 to 10.46) | <0.001 |
| HIV/STI Status | |||||||
| STI only | 47 (58.8%) | 145 (48.3%) | 192 (50.5%) | Ref | Ref | ||
| HIV only | 12 (15.0%) | 60 (20.0%) | 72 (19.0%) | 0.60 (0.31 to 1.14) | 0.12 | 0.55 (0.27 to 1.11) | 0.10 |
| HIV and STI co-infection | 21 (26.3%) | 95 (31.7%) | 116 (30.5%) | 0.97 (0.57 to 1.64) | 0.90 | 1.08 (0.66 to 1.78) | 0.75 |
| Partnership Characteristics | |||||||
|---|---|---|---|---|---|---|---|
| Anonymous Partnership (N=118) | Non-anonymous Partnership (N=853) | Overall | PR (95% CI) | P-value | aPR (95% CI) | P-value | |
| Unprotected sex with partner | 49 (41.5%) | 414 (48.5%) | 463 (47.7%) | 0.78 (0.50 to 1.21) | 0.27 | 0.71 (0.44 to 1.13) | 0.15 |
| Perceived likelihood of transmitting infection | |||||||
| Not likely or impossible | 50 (42.4%) | 336 (39.4%) | 386 (39.8%) | Ref | Ref | ||
| Somewhat likely | 31 (34.8%) | 327 (38.3%) | 368 (37.9%) | 0.86 (0.54 to 1.38) | 0.53 | 0.80 (0.49 to 1.28) | 0.35 |
| Very likely or certain | 7 (5.9%) | 63 (7.4%) | 70 (7.2%) | 0.77 (0.33 to 1.82) | 0.56 | 0.56 (0.25 to 1.25) | 0.16 |
| I don't know | 20 (17.0%) | 127 (14.9%) | 147 (15.1%) | 1.05 (0.58 to 1.91) | 0.87 | 0.78 (0.41 to 1.50) | 0.46 |
| Perceived likelihood that partner is source of infection | |||||||
| Not likely or impossible | 38 (32.2%) | 278 (32.6%) | 316 (32.5%) | Ref | Ref | ||
| Somewhat likely | 39 (33.1%) | 313 (36.7%) | 352 (36.3%) | 0.92 (0.59 to 1.45) | 0.72 | 0.97 (0.59 to 1.57) | 0.89 |
| Very likely or certain | 18 (15.3%) | 107 (12.5%) | 125 (12.9%) | 1.20 (0.64 to 2.26) | 0.58 | 1.64 (0.88 to 3.06) | 0.12 |
| I don't know | 23 (19.5%) | 155 (18.2%) | 178 (18.3%) | 1.07 (0.59 to 1.97) | 0.82 | 1.30 (0.63 to 2.68) | 0.48 |
| Partner's Gender | |||||||
| Male | 100 (84.8%) | 777 (91.1%) | 877 (90.3%) | Ref | Ref | ||
| Female | 13 (11.0%) | 60 (7.0%) | 73 (7.5%) | 1.56 (0.84 to 2.92) | 0.16 | 2.28 (1.05 to 4.94) | 0.04 |
| Transgender/Travesti | 5 (4.2%) | 16 (1.9%) | 21 (2.2%) | 2.09 (0.86 to 5.06) | 0.10 | 4.03 (1.51 to 10.78) | 0.006 |
Abbreviations: PR: prevalence ratio; APR: adjusted prevalence ratio; CI: confidence interval
1
Estimated with a bivariate robust Poisson generalised estimating equation model
2
Estimated with a multivariable robust Poisson generalised estimating equation model