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Table 5 Logistic regression of syphilis infection among men who have sex with men in Guangxi (surveys from all 5 years, 2008–2012)

From: HIV and syphilis prevalence trends among men who have sex with men in Guangxi, China: yearly cross-sectional surveys, 2008–2012

   Infection Adjusted Odds  
Variable N n(%) Ratio OR (95% CI) P-value
Age <0.001
  ≤25 2421 112(4.6%) 1  
  >25 3948 326(8.3%) 1.83(1.42,2.36)  
Registered Guangxi resident 0.04
  No 808 69(8.5%) 1  
  Yes 5558 369(6.6%) 0.73(0.54,0.98)  
Used condom with male in the past 6 months 0.008
  No 4431 323(7.3%) 1  
  Yes 407 15(3.7%) 0.49(0.29,0.83)  
Had sex with female in the past six months 0.01
  No 4966 357(7.2%) 1  
  Yes 1378 80(5.8%) 0.69(0.52,0.92)  
  1. Note: Variables of age, registered Guangxi resident, used condom in the last male-male sex, used condom with male in the past 6 months, had sex with female in the past six months, and syphilis infection by year were included in the multivariate model.