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Table 2 Factors associated with HIV infection among 3717 Chinese MSM

From: Commercial sex and risk of HIV, syphilis, and herpes simplex virus-2 among men who have sex with men in six Chinese cities

Characteristic No. of MSM HIV positive (%) Crude OR (95% CI) P-value AOR (95% CI) P-value
Commercial sex
 NC-MSM 378 (10.9) Ref. 0.55 Ref. 0.88
 MSM-buying 13 (12.6) 1.2 (0.7–2.1)   1.1 (0.5–2.5)  
 MSM-selling 20 (13.4) 1.3 (0.8–2.1)   1.2 (0.5–2.6)  
Syphilis positive
 No 333 (9.8) Ref. <0.001 Ref. <0.001
 Yes 78 (23.9) 2.9 (2.2–3.8)   2.0 (1.4–2.8)  
HSV-2 positive
 No 275 (9.2) Ref. <0.001 Ref. <0.001
 Yes 88 (21.5) 2.7 (2.1–3.5)   2.3 (1.7–3.1)  
Age (per year)   1.0 (1.0–1.1) 0.001 1.0 (0.9–1.0) 0.24
Married to a woman
 No 293 (10.4) Ref. 0.018 Ref. 0.18
 Yes 118 (13.2) 1.3 (1.0–1.7)   1.2 (0.9–1.6)  
Time living in the study city
 >6 months 317 (11.4) Ref. 0.023 Ref. 0.031
 ≤6 months 42 (16.1) 1.5 (1.1–2.1)   1.5 (1.0–2.2)  
Student
 No 376 (11.9) Ref. <0.001 Ref. 0.002
 Yes 35 (6.4) 0.5 (0.4–0.7)   0.5 (0.3–0.8)  
Education
 College or above 210 (9.9) Ref. 0.008 Ref. 0.15
 High school or below 201 (12.6) 1.3 (1.1–1.6)   1.2 (0.9–1.5)  
Seeking partners online
 No 121 (10.5) Ref. 0.6 Ref. 0.72
 Yes 284 (11.1) 1.1 (0.8–1.3)   1.1 (0.8–1.4)  
Number of male sex partners in past 6 months
 0–2 220 (9.5) Ref. <0.001 Ref. 0.023
 3–9 147 (14.0) 1.5 (1.2–1.9)   1.4 (1.1–1.8)  
 ≥10 34 (11.6) 1.2 (0.8–1.8)   1.1 (0.7–1.7)  
Drug use in past 6 months
 No 237 (10.1) Ref. <0.001 Ref. <0.001
 Yes 144 (16.3) 1.7 (1.4–2.1)   1.7 (1.3–2.2)  
UAI in past 6 months
 No 123 (8.8) Ref. <0.001 Ref. 0.001
 Yes 288 (12.4) 1.5 (1.2–1.8)   1.5 (1.2–1.9)  
Predominant anal sex position
 Receptive 265 (12.8) Ref. <0.001 Ref. 0.014
 Insertive 139 (9.0) 0.7 (0.5–0.8)   0.7 (0.6–0.9)