Analysis on the prevalence and influencing factors of HIV among men who have sex with men in Tianjin

Objective To investigate the prevalence and related-risk factors related HIV among men who have sex with men (MSM) in Tianjin. Methods From January to December 2017, the research subjects were recruited by web-based or on site recruitment in Tianjin. Blood specimens were collected for the detection of antibodies against HIV and syphilis, single factor analysis and multivariate logistic regression were used to analyze the related factors of HIV infection. Results A total of 6 597 MSM were surveyed. The positive rate of HIV was 2.8% (184/6 597) while that of syphilis was 10.0% (660/6 597). The awareness rate of HIV among HIV-negative subjects (95.2%, 6 104/6 413) was higher than that of HIV-positive ones (89.1%, 164/184). Multiple logistic regression analysis revealed that the probability of HIV infection was lower among unmarried and married/co-resident subjects, and those received higher degree of education. The OR (95CI%) values were 0.33 (0.20-0.54) and 0.27 (0.15-0.49), respectively. Higher risk factors of HIV infection included subjects from other provinces, ethnic minorities, the last homosexual anal intercourse without condom, seldom or never use condom in the last 6 months, commercial sexual behavior and syphilis infection. Conclusions The positive rate of HIV had reached a high level among MSM in Tianjin. MSM were very active on the internet and were more inclined to use the internet to find sexual partners. People under 20 years old should be focused in the prevention and control measures, and more effective network intervention measures are needed to promote knowledge of HIV/AIDS, so as to contain HIV infections. Key words: HIV; Sexual behavior; MSM; Prevalence