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Objective: To identify related factors associated with unprotected anal intercourse (UAI) among HIV-positive men who have sex with men (MSM) in the context of knowing their HIV infection status. Methods: HIV positive MSM who known that they had been infected with HIV for more than 6 months and accepted follow up services were recruited by convenience sampling method in Chengdu 2015. Semi-structured questionnaire was used to collect their information, such as demographic characteristics, antiviral therapy and sexual behavior characteristics etc. Logistic regression model was used for univariate and multivariate analyses. Results: A total of 330 HIV- positive MSM were recruited, 201 eligible MSM were interviewed. The prevalence of UAI in recent six months was 18.41% (37/201). The results of multivariate logistic regression analysis revealed that the number of anal intercourse with male ≥3 in last month (OR=6.22, 95%CI: 1.88-20.56), low education level (OR=7.29, 95%CI: 1.36-39.16), married, divorced or widowed status (OR=4.65, 95%CI: 1.13-19.17), homosexual cohabitation (OR=3.32, 95%CI: 1.01-10.95) were the risk factors related with UAI among the HIV-positive MSM. Conclusion: Frequent homosexual anal intercourse, low education level, married, divorced or widowed status and homosexual cohabitation might be the risk factors related with UAI in HIV-positive MSM in Chengdu.

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Objective To identify related factors associated with unprotected anal intercourse (UAI) among HIV-positive men who have sex with men (MSM) in the context of knowing their HIV infection status.Methods HIV positive MSM who known that they had been infected with HIV for more than 6 months and accepted follow up services were recruited by convenience sampling method in Chengdu 2015.Semi-structured questionnaire was used to collect their information,such as demographic characteristics,antiviral therapy and sexual behavior characteristics etc.Logistic regression model was used for univariate and multivariate analyses.Results A total of 330 HIV-positive MSM were recruited,201 eligible MSM were interviewed.The prevalence of UAI in recent six months was 18.41％ (37/201).The results of multivariate logistic regression analysis revealed that the number of anal intercourse with male ≥3 in last month (OR=6.22,95％CI:1.88-20.56),low education level (OR=7.29,95％CI:1.36-39.16),married,divorced or widowed status (OR=4.65,95％CI:1.13-19.17),homosexual cohabitation (OR=3.32,95％CI:1.01-10.95) were the risk factors related with UAI among the HIV-positive MSM.Conclusion Frequent homosexual anal intercourse,low education level,married,divorced or widowed status and homosexual cohabitation might be the risk factors related with UAI in HIV-positive MSM in Chengdu.

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To describe the trends of the HIV epidemic among men who have sex with men (MSM) in Chengdu city, China, consecutive cross-sectional surveys were conducted by the Chengdu Center for Disease Control and Prevention. These surveys were carried out between 2009 and 2014 according to the protocol of the national HIV Sentinel Surveillance System. For the 2422 MSM who participated in the survey, the overall HIV prevalence was 15.5% (375/2422, 95% CI 14.0-16.9%). Between 2009 and 2014, the HIV prevalence of MSM remained high, with HIV-positivity rates of 15.0%, 15.1%, 16.3%, 13.9%, 17.8% and 14.0% each year respectively (χ2 for trend = 0.008, P = 0.931). However, the majority (89.8%) of participants had had anal sex in the six months prior to the interview, and the percentage always using condoms during anal sex increased over the study period (36.7% in 2009, 39.8% in 2010, 36.9% in 2011, 46.2% in 2012, 65.1% in 2013, 49.0% in 2014; Chi-square for trend = 49.883, P < 0.001). HIV prevalence among MSM in Chengdu city has remained high. Given the continuing high levels of unprotected anal intercourse and high HIV prevalence among MSM, more effective intervention strategies are required to increase the coverage of MSM by risk-reduction interventions and to promote HIV testing among this population.

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