Associations between HIV risk factors and CHOP questionnaire respondent’s HIV status and current PrEP usage
| Risk behaviours for HIV and demographic categories | Respondents in subgroup (%) | Number with risk factor (%) | OR* (95%CI) | P value |
| CAI in the past 3 months | ||||
| HIV negative/unsure and not on PrEP | 404 (65.5) | 240 (59.4) | 1.0 | |
| HIV negative/unsure and using PrEP | 173 (28.2) | 162 (93.1) | 9.2 (5.0 to 17.1) | <0.001 |
| HIV diagnosed | 39 (6.3) | 30 (76.9) | 2.3 (1.1 to 4.9) | 0.036 |
| Diagnosis with a rectal gonorrhoea, chlamydia or acute syphilis in the past 12 months | ||||
| HIV negative/unsure and not on PrEP | 375 (64.4) | 19 (5.1) | 1.0 | |
| HIV negative/unsure and using PrEP | 170 (29.2) | 17 (10.0) | 2.1 (1.1 to 4.1) | 0.035 |
| HIV diagnosed | 37 (6.4) | 6 (16.2) | 3.6 (1.3 to 9.7) | 0.011 |
| PEP use in the past 12 months | ||||
| HIV negative/unsure and not on PrEP | 404 (70.1) | 28 (6.9) | 1.0 | |
| HIV negative/unsure and using PrEP | 172 (29.9) | 25 (14.5) | 2.3 (1.3 to 4.0) | 0.005 |
| HIV diagnosed | - - | - - | - - | – |
| Chemsex in the past 12 months | ||||
| HIV negative/unsure and not on PrEP | 403 (65.5) | 9 (2.2) | 1.0 | |
| HIV negative/unsure and using PrEP | 173 (28.2) | 26 (15.0) | 7.7 (3.5 to 16.9) | <0.001 |
| HIV diagnosed | 39 (6.3) | 7 (18.0) | 9.6 (3.3 to 27.4) | <0.001 |
CHOP, Challenges and Opportunities of PrEP; PEP, post-exposure prophylaxis; PrEP, pre-exposure prophylaxis.