Table 1. Descriptive Statistics for demographics and behaviors.
| Variable | By site |
||||
|---|---|---|---|---|---|
| Total n (%) | Chengdu | Xi’an | Taiyuan | P-value | |
| Total | 889 | 289 | 300 | 300 | |
| Age | 32.17 ± 9.73 | 35.32 ± 12.07 | 31.63 ± 8.05 | 31.29 ± 8.12 | <0.01 |
| ≤29 years | 420(47.25) | 114(39.45) | 153(51.00) | 153(51.00) | |
| 30–39 years | 287(32.28) | 99(34.26) | 96(32.00) | 92(30.67) | |
| ≥40 years | 182(20.47) | 76(26.30) | 51(17.00) | 55(18.33) | |
| Education | |||||
| ≤9 years | 111(12.49) | 57(19.72) | 37(12.33) | 17(5.67) | <0.01 |
| 10–12 years | 188(21.15) | 81(28.03) | 49(16.33) | 58(19.33) | |
| >12 years | 590(66.37) | 151(52.25) | 214(71.33) | 225(75.00) | |
| Marriage status | |||||
| Unmarried | 599(67.38) | 194(67.13) | 208(69.33) | 197(65.67) | 0.06 |
| Married | 217(24.41) | 61(21.11) | 74(24.67) | 82(27.33) | |
| Divorced or widowed | 73(8.21) | 34(11.76) | 18(6.00) | 21(7.00) | |
| Self-reported sexual orientation | |||||
| Homosexual | 627(70.53) | 196(67.82) | 184(61.33) | 247(82.33) | <0.01 |
| Heterosexual | 9(1.01) | 3(1.04) | 4(1.33) | 2(0.67) | |
| Bisexual | 219(24.63) | 86(29.76) | 87(29.00) | 46(15.33) | |
| Not sure | 34(3.82) | 4(1.38) | 25(8.33) | 5(1.67) | |
| Ever had sex with women | |||||
| Yes | 430(48.37) | 161(55.71) | 148(49.33) | 121(40.33) | <0.01 |
| No | 459(51.63) | 128(44.29) | 152(50.67) | 179(59.67) | |
| Number of lifetime homosexual partners | |||||
| 1–5 | 235(26.43) | 84(29.07) | 89(29.67) | 62(20.67) | 0.03 |
| 6–10 | 259(29.13) | 93(32.18) | 83(27.67) | 83(27.67) | |
| 11–30 | 263(29.58) | 78(26.99) | 81(27.00) | 104(34.67) | |
| More than 30 | 132(14.85) | 34(11.76) | 47(15.67) | 51(17.00) | |
| Age at first homosexual behavior (years, mean ± SD) | 22.37 ± 6.43 | 23.30 ± 8.11 | 22.55 ± 5.65 | 21.26 ± 5.22 | <0.01 |
| Have current sexual partner | 376(42.29) | 131(45.33) | 98(32.67) | 147(49.00) | <0.01 |
| Ever been diagnosed with genital wart | 90(10.02) | 21(7.27) | 37(12.33) | 32(10.67) | 0.12 |
| Ever been diagnosed with other STIs than genital wart | 98(11.02) | 19(6.57) | 56(18.67) | 23(7.67) | <0.01 |
| HIV-1 serostatus | |||||
| Negative | 780(87.74) | 247(85.47) | 257(85.67) | 276(92.00) | 0.02 |
| Positive | 109(12.26) | 42(14.53) | 43(14.33) | 24(8.00) | |
Abbreviation: SD, standard deviation; STIs, sexually transmitted infections.