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Table 2 Factors associated with unprotected anal intercourse among MSM in Guangzhou, 2008–2013, by Logistic regression model a

From: Consistently High Unprotected Anal Intercourse (UAI) and factors correlated with UAI among men who have sex with men: implication of a serial cross-sectional study in Guangzhou, China

Factor UAI b% (n) COR (95% CI) c AOR (95% CI) d
Age (years)    
  <20 73.7 (56) 2.75 (1.55-4.88)f 2.22 (1.07-4.61)e
  20-29 59.0 (916) 1.42 (1.07-1.87)e 1.30 (0.87-1.93)
  30-39 57.8 (432) 1.35 (1.00-1.81) 1.17 (0.81-1.67)
  ≥40 50.4 (115) 1.00 1.00
Ethnicity    
  Han 58.5 (1461) 1 -
  Others 54.7 (58) 0.86 (0.58-1.27)  
Hukou (registered permanent residence)    
  Guangzhou 56.7 (472) 1 -
  Other city in Guangdong province 58.4 (354) 1.07 (0.87-1.33)  
  Outside Guangdong province 59.5 (693) 1.13 (0.94-1.35)  
Education level    
  Junior high school or lower 63.4 (204) 1.35 (1.06-1.73)e 1.41 (1.04-1.90)e
  Senior high school 61.2 (415) 1.23 (1.03-1.48)e 1.23 (0.99-1.51)
  College or higher 56.1 (900) 1.00 1.00
Marital status    
  Single 54.7 (903) 1.00 1.00
  Cohabiting with male partner 72.0 (296) 2.13 (1.68-2.70)f 2.15 (1.66-2.79)f
  Married 56.8 (259) 1.08 (0.88-1.34) 1.28 (0.96-1.71)
  Divorced or widowed 70.9 (61) 2.02 (1.26-3.25)f 2.80 (1.54-5.07)f
Monthly income (CNY)    
  0 60.4 (198) 1 -
  ≤2000 62.5 (282) 1.10 (0.82-1.47)  
  2001-3000 57.3 (322) 0.88 (0.67-1.16)  
  3001-4000 57.3 (263) 0.88 (0.66-1.16)  
  >4000 56.5 (454) 0.85 (0.66-1.11)  
Self-perceived sexual orientation    
  Homosexual 59.5 (1012) 1 -
  Bisexual 57.0 (470) 0.90 (0.76-1.08)  
  Uncertain 53.0 (97) 0.77 (0.57-1.04)  
Venues for meeting partners    
  Bar, disco, tea house or club 60.6 (94) 1 -
  Bath house, sauna or massage 61.0 (47) 1.02 (.058-1.780  
  Park, public toilet 55.4 (96) 0.81 (0.52-1.27)  
  Internet 58.5 (1155) 0.92 (0.66-1.28)  
  Other 56.3 (129) 0.84 (0.55-1.27)  
Age of first sex with male (years)    
  <19 63.8 (298) 1.00 1.00
  19-24 58.7 (756) 0.80 (0.65-1.00) 0.93 (0.73-1.20)
  ≥25 55.0 (465) 0.69 (0.55-0.87)f 0.78 (0.58-1.05)
HIV test in the past 12 months    
  Yes 55.3 (679) 1.00 1.00
  no 61.1 (834) 1.28 (1.08-1.48)f 1.36 (1.12-1.65)f
UVIb    
  Yes 61.9 (208) 1.16 (0.94-1.50)  
  No 57.8 (1311) 1 -
Coverage of HIV intervention    
  Yes 57.0 (1186) 1.00 1.00
  no 63.8 (333) 1.33 (1.09-1.62)f 1.21 (0.94-1.56)
Number of male partners in the past 6 months   
  1 59.3 (463) 1.00 1.00
  2 63.3 (394) 1.18 (0.96-1.47) 1.27 (1.02-1.59)e
  3 67.4 (302) 1.42 (1.11-1.81)f 1.49 (1.16-1.92)f
  4-9 71.6 (272) 1.73 (1.33-2.25)f 1.77 (1.35-2.33)f
  ≥10 73.5 (86) 1.91 (1.23-2.94)f 1.85 (1.18-2.91)f
  1. aOnly factors significant in univariate analysis were included in the multivariate logistic regression model.
  2. bUnprotected anal intercourse.
  3. cUnivariate logistic regression analysis; dMultivariate logistic regression analysis.
  4. e P < 0.05; f P < 0.01.