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Table 2 Univariate logistic regression analysis of risk factors in HIV-1-infected men having sex with men (MSM)

From: Risk Factors for HIV-1 seroconversion among Taiwanese men visiting gay saunas who have sex with men

Variable HIV (+)
N= 81
n(%)
HIV (-)
N= 1, 012
n(%)
Odds ratio 95% Confidence interval
Role during anal intercourse    
Versatile 53/77 (68.8) 410/824 (49.8) 2.55 1.41~4.61
Exclusively receptive 9/77 (11.7) 118/824 (14.3) 1.51 0.64~3.53
Exclusively insertive 15/77 (19.5) 296/824 (35.9) 1  
Frequency of anal sex during sexual intercourse   
Always/frequently/occasionally/rarely* 73/78 (93.6) 793/941 (84.3) 2.73 1.08~6.86
Never 5/78 (6.4) 148/941 (15.7) 1  
Number of sexual partners in the past 3 months   
≥ 2 55/69 (79.7) 565/802 (70.4) 1.65 0.90~3.02
0 or 1 14/69 (20.3) 237/802 (29.6) 1  
Frequency of anal rimming    
Always/frequently/occasionally/rarely* 54/78 (69.2) 493/938 (52.6) 2.03 1.24~3.34
Never 24/78 (30.8) 445/938 (47.4) 1  
Number of sexual partners during each sauna visit   
≥ 2 39/74 (52.7) 316/808 (39.1) 1.73 1.08~2.80
0 or 1 35/74 (47.3) 492/808 (60.9) 1  
Frequency of sauna visits     
Once a month or less 54/67 (80.6) 665/815 (81.5) 0.94 0.50~1.77
More than once a month 13/67 (19.4) 151/816 (18.5) 1  
Other STDs
Yes 19/77 (24.6) 172/926 (18.6) 1.44 0.83~2.47
No 58/77 (75.3) 754/926 (81.4) 1  
Recreational drugs before visiting sauna
Always/frequently/occasionally/rarely* 11/78 (14.1) 76/946 (8.0) 1.88 0.95~3.71
Never 67/78 (85.9) 870/946 (92.0) 1  
Frequency of condom use during sexual intercourse   
Occasionally/Rarely/Never* 34/61 (55.7) 308/652 (47.2) 1.39 0.82~2.36
Always 27/61 (44.3) 344/652 (52.8) 1  
Circumcised     
No 66/79 (83.5) 692/945 (73.2) 1.85 1.01~3.42
Yes 13/79 (16.5) 253/945 (26.8) 1  
Age     
≤ 35 years 68/78 (87.2) 637/923 (69.0) 2.70 1.07~6.79
> 35 years 10/78 (12.8) 286/923 (31.0) 1  
  1. * Detailed information is available in the additional file 3.