Prevalence of HIV-related behaviours among men who have sex with men in the Attitudes to and Understanding Risk of Acquisition of HIV (AURAH) (n=991) and Attitudes to and Understanding Risk of Acquisition of HIV over Time (AURAH2) (n=1031) studies and association of these measures with study
| Measures of sexual behaviour | Study | Prevalence n (%) (95% CI) | Unadjusted PR (95% CI) AURAH2 vs AURAH* | P value† | Adjusted‡ PR (95% CI) | P value† |
| CLS with one or more partners (past 3 months) | AURAH | 558 (56.3%) (53.3% to 59.4%) | 1.14 (1.07 to 1.23) | <0.001 | 1.14 (1.05 to 1.24) | 0.001 |
| AURAH2 | 664 (64.4%) (61.5% to 67.4%) | |||||
| CLS with two or more partners (past 3 months) | AURAH | 286 (28.8%) (26.1% to 31.8%) | 1.22 (1.08 to 1.39) | 0.002 | 1.22 (1.05 to 1.41) | 0.008 |
| AURAH2 | 365 (35.4%) (32.5% to 38.4%) | |||||
| CLS with unknown/HIV+ status partner(s) (past 3 months) | AURAH | 310 (31.3%) (28.5% to 34.3%) | 1.00 (0.88 to 1.14) | 0.944 | 0.99 (0.85 to 1.14) | 0.893 |
| AURAH2 | 324 (31.4%) (28.7% to 34.3%) | |||||
| Receptive CLS with unknown HIV status partner(s) (past 3 months) | AURAH | 116 (11.7%) (9.8% to 13.8%) | 1.06 (0.84 to 1.34) | 0.624 | 0.98 (0.75 to 1.28) | 0.901 |
| AURAH2 | 128 (12.4%) (10.5% to 14.6%) | |||||
| Self-reported bacterial STIdiagnosis (past year) | AURAH | 303 (30.5%) (27.8% to 33.5%) | 1.30 (1.15 to 1.47) | <0.001 | 1.24 (1.08 to 1.43) | 0.002 |
| AURAH2 | 411 (39.8%) (36.9% to 42.9%) | |||||
| Eleven or more new sexual partners (past year) | AURAH | 374 (37.7%) (34.8% to 40.1%) | 1.07 (0.97 to 1.20) | 0.168 | 1.11 (0.98 to 1.25) | 0.09 |
| AURAH2 | 420 (40.7%) (37.8% to 43.7%) | |||||
| Group sex (past 3 months) | AURAH | 388 (39.1%) (36.2% to 42.2%) | 1.10 (0.99 to 1.22) | 0.069 | 1.10 (0.97 to 1.24) | 0.08 |
| AURAH2 | 438 (42.5%) (39.5% to 45.5%) | |||||
| PEP use (past year) | AURAH | 151 (15.2%) (13.1% to 17.6%) | 1.43 (1.18 to 1.72) | <0.001 | 1.50 (1.21 to 1.88) | <0.001 |
| AURAH2 | 224 (21.7%) (19.3% to 24.4%) | |||||
| PrEP use (past year) | AURAH | 38 (3.8%) (2.5% to 4.5%) | 1.44 (0.96 to 2.15) | 0.074 | 1.31 (0.70 to 1.82) | 0.611 |
| AURAH2 | 57 (5.5%) (4.3% to 7.1%) | |||||
| Recent HIV test (past 6 months) | AURAH | 631 (63.8%) (60.7% to 66.7%) | 1.15 (1.09 to 1.22) | <0.001 | 1.14 (1.07 to 1.21) | <0.001 |
| AURAH2 | 757 (73.4%) (70.6% to 76.0%) |
*AURAH is the reference group.
† P value by Wald test.
‡Adjusted model (ii) study, age (continuous variable), ethnicity, sexual identity, university education, ongoing relationship status (Poisson model on subject with no missing values for all the variables included in the model).
AURAH, Attitudes to and Understanding Risk of Acquisition of HIV; AURAH2, Attitudes to and Understanding Risk of Acquisition of HIV over Time; CLS, condomless sex; PEP, post-exposure prophylaxis; PR, prevalence ratio; PrEP, pre-exposure prophylaxis.