摘要目的 了解成都市知晓自身HIV阳性的MSM人群无保护肛交行为(UAI)的相关影响因素.方法 2015年采用方便抽样在成都招募已接受随访服务且知晓自身HIV阳性≥6个月的MSM,采用问卷调查收集MSM最近6个月性行为情况及相关信息.采用logistic回归进行单因素和多因素分析.结果 共招募知晓自身HIV阳性的MSM 330人,实际调查201人,最近6个月的UAI发生率为18.41％(37/201).多因素logistic回归分析显示,最近1个月肛交次数≥ 3次(OR=6.22,95％CI:1.88～20.56)、初中及以下文化程度(OR=7.29,95％CI:1.36～39.16)、已婚/离异/丧偶(OR=4.65,95％CI:1.13～19.17)、与同性同居(OR=3.32,95％CI:1.01 ～ 10.95)是可能发生UAI的相关因素.结论 频繁同性肛交、初中及以下文化程度、已婚/离异/丧偶、与同性同居是知晓自身HIV阳性的MSM人群发生UAI的相关因素.

abstractsObjective 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.