Table 2.
The mean age at first anal intercourse according to risk behaviours and STI status among MSM in China
| Univariate regression | Multivariate regression | |||||
|---|---|---|---|---|---|---|
| n (%) | Mean AFAI | Beta coefficient | p | Adjusted beta coefficient | pa | |
| Role in AI | ||||||
| Top | 1393 (31.7) | 23.4 | Ref | Ref | ||
| Bottom | 976 (22.4) | 21.3 | −2.14 | <0.001 | −0.22 | 0.269 |
| Versatile | 2022 (45.9) | 22.1 | −1.36 | <0.001 | −0.04 | 0.832 |
| Gender of the first partner | ||||||
| Male | 2922 (65.1) | 20.2 | −6.08 | <0.001 | −4.21 | <0.001 |
| Female | 1959 (34.9) | 26.2 | Ref | Ref | ||
| Condom use in recent AI with a man | ||||||
| Yes | 3241 (73.4) | 22.1 | −0.63 | 0.003 | −0.14 | 0.388 |
| No | 1172 (26.6) | 22.8 | Ref | Ref | ||
| Number of male partners in P6M | ||||||
| 0 | 293 (6.5) | 23.0 | Ref | Ref | ||
| 1–2 | 2453 (54.6) | 22.7 | −0.28 | 0.477 | 0.30 | 0.323 |
| > 2 | 1745 (38.9) | 21.6 | −1.40 | <0.001 | −0.34 | 0.276 |
| Commercial sex in P6Mb | ||||||
| Yes | 459 (10.2) | 20.1 | −2.39 | <0.001 | −0.17 | 0.500 |
| No | 4032 (89.8) | 22.5 | Ref | Ref | ||
| Vaginal intercourse with women in P6M | ||||||
| Yes | 832 (18.5) | 24.4 | 2.65 | <0.001 | 0.064 | 0.748 |
| No | 3659 (81.5) | 21.8 | Ref | Ref | ||
| Rush or Ecstasy use in P6M | ||||||
| Yes | 1191 (26.5) | 20.8 | −2.02 | <0.001 | −0.42 | 0.011 |
| No | 3300 (73.5) | 22.8 | Ref | Ref | ||
AFAI: age at first anal intercourse; P6M: past six months; Ref: reference category; AI: anal intercourse.
a
Adjusted for source city, age cohort, education, sexual orientation, marital status, occupation, and income.
b
Includes selling sex to and buying sex from both men and women in the past six months.