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. 2012 May 18;7(5):e37211. doi: 10.1371/journal.pone.0037211

Table 2. Factors associated with HIV infection among 503 men who have sex with men in Chongqing City, China, 2009.

Factors No. of participants No. of HIV positives (%) Crude OR (95%CI) P-value Adjusted OR (95%CI) a P-value
Age (year) 0.001 0.059
 ≤23 284 21(7.4) 1.00 1.00
 >23 219 37(16.9) 3.7(1.7–8.1) 2.2(1.0–4.9)
Ethnicity 0.05 0.001
 Han majority 485 53(11.0) 1.00 1.00
 Other minorities 18 5(27.8) 4.0(1.0–16.2) 8.3(2.4–29.1)
Education 0.02 0.161
 High school or below 153 26(16.8) 1.00 1.00
 College or above 350 32(9.3) 0.4(0.2–0.9) 0.6(0.2–1.3)
Marital status 0.01 0.281
 Never married 461 9(21.4) 1.00 1.00
 Ever married b 42 49(10.7) 0.3(0.1–0.7) 0.5(0.2–1.7)
Currently living with a male sexual partner 0.36
 No 401 45(11.4) 1.00
 Yes 102 13(12.3) 0.6(0.2–1.7)
Occupation 0.001 0.012
 Non-student 381 49(15.3) 1.00 1.00
 Student 122 9(4.9) 0.2(0.1–0.5) 0.3(0.1–0.8)
Duration of living in Chongqing City (year) 0.16
 ≤21 179 45(12.4) 1.00
 >21 324 13(8.9) 0.6(0.3–1.3)
Having incomes in the last year 0.10
 No 284 13(7.3) 1.00
 Yes 219 45(13.9) 2.1(0.9–5.2)
Having a health insurance 0.66
 No 304 34(12.1) 1.00
 Yes 199 24(10.9) 0.8(0.4–1.7)
Ever having sex with a woman 0.59
 No 390 29(9.7) 1.00
 Yes 113 29(14.4) 1.2(0.6–2.7)
Duration of practicing homosexual sex with a man (year) 0.68
 ≤5 381 42(10.7) 1.00
 >5 122 16(14.5) 1.2(0.5–3.0)
Self reported sexual orientation 0.58
 Homosexual 146 45(11.8) 1.00
 Heterosexual 334 13(11.0) 1.3(0.5–3.2)
Role in anal sex, if any (n = 480) c 0.55
 Largely insertive 222 10(6.9) 1.00
 Largely receptive 281 48(14.4) 1.4(0.5–3.7)
Number of male partner in the past 6 months 0.81
 ≤1 478 17(7.6) 1.00
 >1 25 41(14.7) 1.1(0.5–2.3)
Exchanging sex for money in the past 6 months 0.34
 No 365 55(11.6) 1.00
 Yes 138 3(11.5) 2.3(0.4–13.0)
Venue for finding the last male sexual partner in the past 6 months (n = 477) d 0.90
 Non-internet 139 13(9.2) 1.00
 Internet (ever) 338 40(12.0) 1.1(0.4–2.8)
Syphilis infection 0.12
 No 477 51(10.7) 1.00
 Yes 26 7(26.9) 2.8(0.8–10.3)
a

Adjusted values using RDSAT-generated weights for a respondent driven sample.

b

Including married, divorced and widowed.

c

24 men reported oral sex or masturbation only.

d

26 men reported no male sexual partner in the past 6 months.

OR: odds ratio; CI: confidence interval.