Table 2 RD and other factors associated with HIV infection among MSM using logistic regression model†(N = 515)
Characteristic | N = 515 | HIV infection (%) | Crude OR (95% CI) | Model †AOR# (95% CI) | P-value |
|---|---|---|---|---|---|
Information related to most recent anal sex | |||||
 Main sexual role with males | |||||
  Top | 176 | 14 (8.0) | 1 | 1 |  |
  Bottom | 165 | 31 (18.8) | 2.7 (1.4–5.2) | 2.4 (1.2–4.9) | 0.010 |
  Versatile | 174 | 15 (8.6) | 0.9 (0.5–2.3) | 1.0 (0.5–2.3) | 0.908 |
 CRAI | |||||
  No | 369 | 30 (8.1) | 1.0 | 1.0 |  |
  Yes | 146 | 30 (20.5) | 2.9 (1.7–5.1) | 2.7 (1.6–4.7) | < 0.001 |
 CIAI | |||||
  No | 394 | 41 (10.4) | 1.0 | 1.0 |  |
  Yes | 121 | 19 (15.7) | 1.6 (0.9–2.9) | 1.6 (0.9–2.9) | 0.130 |
 Serosorting | |||||
  Yes | 110 | 8 (7.3) | 1.0 | 1.0 |  |
  No | 405 | 52 (12.8) | 1.9 (0.9–4.1) | 1.9 (0.9–4.2) | 0.103 |
 Rectal douching | |||||
  No | 198 | 12 (6.1) | 1.0 | 1.0 |  |
  Yes | 317 | 48 (15.1) | 2.8 (1.4–5.3) | 2.8 (1.4–5.4) | 0.003 |
 RD × CRAI& | |||||
  Reference | 404 | 33 (8.2) | 1.0 | 1.0 |  |
  RD × CRAI | 111 | 27 (24.3) | 3.6 (2.1–6.3) | 3.5 (2.0–6.2) | < 0.001 |
 Rectal douching before sex | |||||
  No | 208 | 15 (7.2) | 1.0 | 1.0 |  |
  Yes | 307 | 45 (14.7) | 2.2 (1.2–4.1) | 2.2 (1.2–4.2) | 0.012 |
 Rectal douching after sex | |||||
  No | 317 | 29 (9.1) | 1.0 | 1.0 |  |
  Yes | 198 | 31 (15.7) | 1.8 (1.1–3.2) | 1.9 (1.1–3.2) | 0.026 |
 Equipment used for RD | |||||
  Commercial tools | 48 | 3 (6.3) | 1.0 | 1.0 |  |
  Shower hose | 270 | 45 (16.7) | 3.0 (0.9–10.1) | 3.3 (1.0–11.3) | 0.053 |
  No RD | 197 | 12 (6.1) | 1.0 (0.3–3.6) | 1.1 (0.3–3.9) | 0.941 |
 Douching liquids | |||||
  Top water | 311 | 46 (14.8) | 1.0 | 1.0 |  |
  Water + soap | 5 | 2 (40.0) | 3.8 (0.6–23.6) | 5.8 (0.8–41.2) | 0.076 |
  Vaginal/traditional Chinese medicine lotion | 2 | 0 (0.0) | NA | NA | 0.999 |
  No RD | 197 | 12 (6.1) | 0.4 (0.2–0.7) | 0.4 (0.2–0.7) | 0.004 |
 Used nitrite inhalants | |||||
  No | 364 | 32 (8.8) | 1.0 | 1.0 |  |
  Yes | 149 | 28 (18.8) | 2.4 (1.4–4.2) | 2.6 (1.5–4.5) | 0.001 |
 Syphilis infection | |||||
  No | 447 | 47 (10.5) | 1.0 | 1.0 |  |
  Yes | 68 | 13 (19.4) | 2.0 (1.0–4.0) | 2.1 (1.1–4.2) | 0.033 |