Table 3 Predictors of HIV acquisition among transgender women and cisgender MSM in two Chinese cities
Factors | n | Person-years | HIV positive (n) | HIV rate per 100 person-years (95% CI) | HR (95% CI) | P | AHR (95% CI) | P |
|---|---|---|---|---|---|---|---|---|
Transgender women (n = 439) | ||||||||
 City | ||||||||
  Tianjin | 246 | 333.1 | 8 | 2.40 (1.04–4.73) | 1 |  |  |  |
  Shanghai | 193 | 186.83 | 15 | 8.03 (4.48–13.25) | 2.05 (1.32–3.18) | 0.00 |  |  |
 Local residence time (years) | ||||||||
    > 2 | 265 | 320.6 | 7 | 2.18 (0.88–4.49) | 1 |  | 1 |  |
    ≤ 2 | 174 | 199.33 | 16 | 8.03 (4.58–13.03) | 1.93 (1.24–3.01) | 0.00 | 1.76 (1.13, 2.76) | 0.013 |
 Sex orientation | ||||||||
  Gay | 322 | 425.43 | 16 | 3.76 (2.15–6.11) | 1 |  |  |  |
  Heterosexual & others | 18 | 20.88 | 1 | 4.79 (0.12–26.49) | 1.21 (0.16–9.34) | 0.86 |  |  |
  Bisexual | 99 | 73.61 | 6 | 8.15 (2.99–17.67) | 3.71 (1.33–10.35) | 0.01 |  |  |
 Age of sexual debut (years) | ||||||||
   < 18 | 156 | 205.63 | 5 | 2.43 (0.78–5.67) | 1 |  |  |  |
   ≥ 18 | 283 | 314.3 | 18 | 5.73 (3.4–9.06) | 2.52 (0.93–6.8) | 0.07 |  |  |
 Unprotected anal sex last timea | ||||||||
  Yes | 92 | 90.9 | 11 | 12.1 (6.01–21.69) | 5.00 (2.18–11.49) | 0.00 | 4.22 (1.82, 9.79) | 0.001 |
  No | 347 | 429.03 | 12 | 2.80 (1.44–4.87) | 1 |  | 1 |  |
 Buying sex (past 3 months)a | ||||||||
  Yes | 17 | 21.2 | 2 | 9.43 (1.14–33.99) | 0.44 (0.1–1.88) | 0.27 |  |  |
  No | 422 | 498.72 | 21 | 4.21 (2.6–6.43) | 1 |  |  |  |
 Selling sex (past 3 months)a | ||||||||
  Yes | 41 | 52.55 | 2 | 3.81 (0.46–13.71) | 1 |  |  |  |
  No | 398 | 467.37 | 21 | 4.49 (2.78–6.86) | 1.3 (0.3–5.57) | 0.73 |  |  |
 Illicit drug use (past 6 months)a | ||||||||
  Yes | 193 | 219.85 | 12 | 5.46 (2.82–9.5) | 1.57 (0.69–3.57) | 0.28 |  |  |
  No | 246 | 300.08 | 11 | 3.67 (1.82–6.57) | 1 |  |  |  |
 Discrimination-related experience at all settings (past 6 m)a | ||||||||
  Yes | 308 | 349.76 | 18 | 5.15 (3.05–8.14) | 1 |  |  |  |
  No | 131 | 170.16 | 5 | 2.94 (0.95–6.85) | 0.54 (0.2–1.45) | 0.22 |  |  |
Cisgender MSM (n = 617) | ||||||||
 Education (years) | ||||||||
   ≤ 9 | 35 | 40.49 | 3 | 7.41 (1.52–21.62) | 7.51 (1.87–30.15) | 0.00 |  |  |
   10–12 | 134 | 161.53 | 1 | 0.62 (0.02–3.42) | 0.58 (0.07–4.81) | 0.61 |  |  |
   ≥ 13 | 448 | 538.63 | 6 | 1.11 (0.41–2.42) | 1 |  |  |  |
 Sex orientation | ||||||||
  Gay | 561 | 672.06 | 7 | 1.04 (0.42–2.14) | 1 |  |  |  |
  Heterosexual & others | 44 | 55.36 | 2 | 3.61 (0.43–13.02) | 3.39 (0.7–16.34) | 0.13 |  |  |
  Bisexual | 12 | 13.24 | 1 | 7.55 (0.19–41.78) | 8.01 (0.98–65.32) | 0.05 |  |  |
 Frequency of anal sex (past 1 m)a | ||||||||
   < 3 | 429 | 514.4 | 3 | 0.58 (0.12–1.7) | 1 |  | 1 |  |
   ≥ 3 | 188 | 226.25 | 7 | 3.09 (1.25–6.36) | 5.21 (1.35–20.17) | 0.02 | 4.19 (1.06–16.47) | 0.04 |
 Unprotected anal sex last timea | ||||||||
  Yes | 71 | 91.95 | 5 | 5.44 (1.75–12.68) | 6.7 (1.94–23.19) | 0.00 | 5.33 (1.52–18.73) | 0.01 |
  No | 546 | 648.7 | 5 | 0.77 (0.25–1.8) | 1 |  | 1 |  |