| Patterns of SDU |
| Poly-use of psychoactive substances during SDU the past year |
| No | 1.0 | |
| Yes | 2.02 (0.58, 7.01) | – |
| Time since the first episode of SDU |
| < 1 year | 1.0 | |
| 1–2 years | 1.00 (0.21, 4.77) | |
| 3–5 years | 1.14 (0.25, 5.33) | |
| > 5 years | 0.59 (0.18, 1.96) | – |
| Frequency of SDU in the past year |
| 1 episode/month | 1.0 | |
| 1–2 episodes/month | 0.81 (0.25, 2.67) | |
| ≥ 3 episodes/month | 1.33 (0.39, 4.58) | – |
| Condomless anal intercourse in the past year |
| No | 1.0 | |
| Yes | 0.88 (0.32, 2.40) | – |
| Perceptions related to PrEP |
| Positive Attitude Scale | 2.30 (1.46, 3.62)*** | 2.37 (1.47, 3.82)*** |
| Negative Attitude Scale | 1.16 (0.91, 1.47) | – |
| People who are important to you will support you to use PrEP |
| Disagree/neutral | 1.0 | 1.0 |
| Agree | 9.14 (2.90, 28.77)*** | 9.67 (2.95, 31.71)*** |
| In general, you are confident in taking PrEP every day in the next six months |
| Strongly disagree/disagree/neutral | 1.0 | 1.0 |
| Agree/strongly agree | 20.57 (5.75, 73.65)*** | 19.68 (5.44, 71.26)*** |
| Mental health status |
| Depressive symptoms |
| No clinical depressive symptoms | 1.0 | |
| Presence of clinical depressive symptoms | 0.88 (0.32, 2.40) | – |
| Anxiety |
| No/mild/anxiety | 1.0 | |
| Severe anxiety | 0.46 (0.08, 2.45) | – |
