Table 4: Univariate and multivariate logistic regression analysis of factors associated with HIV .

VariablesUsing Internet MSM ()Non-Internet MSM ()
HIV prevalence (%)cOR (95% CI)aOR (95% CI)HIV prevalence (%)cOR (95% CI)aOR (95% CI)

Age
 ≤25 years11.0 (66/600)Ref9.5 (40/422)Ref
 >25 years16.5 (66/400)1.6 (1.1–2.3)NA11.3 (63/559)1.2 (0.8–1.8)NA
Monthly income
 None10.3 (33/321)Ref8.7 (19/219)Ref
 1–300 $13.1 (42/321)1.3 (0.8–2.1)NA10.6 (51/480)1.3 (0.7–2.2)NA
 >300 $15.9 (57/358)1.7 (1.1–2.6)NA11.7 (33/282)1.4 (0.8–2.5)NA
Education level
 Junior high school and below14.8 (34/229)Ref10.2 (55/539)Ref
 Senior high school and above12.7 (98/771)0.8 (0.5–1.3)NA10.9 (48/442)1.1 (0.7–1.6)NA
Residence place
 Shenyang9.0 (33/367)RefRef10.6 (29/273)RefRef
 Other cities15.6 (99/633)1.9 (1.2–2.9)1.9 (1.3–2.9)10.5 (74/708)1.0 (0.6–1.6)1.0 (0.6–1.6)
Ethnicity
 Non-Han11.5 (17/148)RefRef11.8 (19/161)RefRef
 Han13.5 (115/852)1.2 (0.7–2.1)1.2 (0.7–2.1)10.2 (84/820)0.9 (0.5–1.4)0.8 (0.5–1.4)
Marriage status
 Single12.5 (102/819)RefRef8.7 (56/645)RefRef
 Others16.6 (30/181)1.4 (0.9–2.2)1.2 (0.7–1.9)14.0 (47/336)1.7 (1.1–2.6)1.7 (1.1–2.5)
Sexual orientation
 Bisexual orientation12.5 (35/281)RefRef8.5 (31/366)RefRef
 Homosexual orientation13.6 (96/704)1.1 (0.7–1.7)1.2 (0.8–1.9)12.0 (70/584)1.5 (1.0–2.3)1.5 (1.0–2.4)
 Heterosexual or not sure6.7 (1/15)0.5 (0.1–3.9)0.5 (0.1–4.1)6.5 (2/31)0.7 (0.2–3.3)0.7 (0.2–3.2)
Age of male sexual behavior debut
 <18 years12.7 (29/229)RefRef13.5 (21/155)RefRef
 18–25 years12.1 (82/678)1.0 (0.6–1.5)0.9 (0.6–1.4)8.9 (53/598)0.6 (0.4–1.1)0.6 (0.4–1.0)
 >25 years22.2 (20/90)2.0 (1.1–3.7)1.5 (0.8–3.1)13.3 (29/218)1.0 (0.5–1.8)0.9 (0.5–1.8)
Condom use with steady male sex partners in the past year
 Always use9.3 (25/268)RefRef5.4 (11/205)RefRef
 Occasionally or never use16.2 (60/371)1.9 (1.1–3.1)1.9 (1.2–3.1)14.0 (54/385)2.9 (1.5–5.6)3.0 (1.5–5.9)
Condom use with casual male sex partners in the past year
 Always use11.1 (47/425)RefRef9.2 (27/294)RefRef
 Occasionally or never use16.7 (64/384)1.6 (1.1–2.4)1.7 (1.1–2.6)12.2 (49/402)1.4 (0.8–2.3)1.4 (0.9–2.4)
Preferred intercourse sexual roles with male partners
 Insertive anal sexual role8.5 (25/295)RefRef6.8 (23/339)RefRef
 Both insertive and receptive roles14.5 (72/495)1.8 (1.1–3.0)2.0 (1.3–3.3)13.7 (65/475)2.2 (1.3–3.6)2.3 (1.4–3.8)
 Receptive anal sexual role17.2 (35/204)2.2 (1.3–3.9)2.5 (1.5–4.5)9.5 (14/148)1.4 (0.7–2.9)1.5 (0.7–3.1)
Number of male sexual partners in the past year
 >1011.8 (32/272)RefRef8.7 (27/311)RefRef
 4–1015.5 (53/343)1.4 (0.9–2.2)1.4 (0.9–2.3)11.1 (33/296)1.3 (0.8–2.3)1.3 (0.8–2.2)
 0–312.2 (47/385)1.0 (0.7–1.7)1.1 (0.7–1.7)11.5 (43/374)1.4 (0.8–2.3)1.3 (0.8–2.3)
STD symptoms in the past year
 No12.9 (122/946)RefRef10.3 (97/946)RefRef
 Yes18.5 (10/54)1.5 (0.8–3.1)1.5 (0.7–3.0)17.1 (6/35)1.8 (0.7–4.5)1.8 (0.7–4.4)
Syphilis infection
 Negative10.5 (93/886)RefRef8.0 (69/863)RefRef
 Positive34.2 (39/114)4.4 (2.9–6.9)4.3 (2.8–6.7)28.8 (34/118)4.7 (2.9–7.4)4.7 (2.9–7.5)

a: adjusted for age, monthly income, and education level. cOR: crude odds ratio. aOR: adjusted odds ratio. , , . NA, not applicable.