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目的了解北京市男男性行为者(MSM)高危性行为情况和发生无保护性肛交(UAI)的影响因素。方法于2014年2-12月,在北京招募MSM,进行面对面问卷调查及艾滋病病毒(HIV)、梅毒抗体检测,应用SAS 9.2软件进行统计分析。结果共调查528名MSM,90.0%(475名)的人在近3个月与男性性伴发生过肛交性行为,其中UAI发生率为47.6%(226/475);HIV和梅毒感染率分别为3.0%(16/528)及18.0%(95/528)。多因素Logistic回归分析结果显示,大专以下文化程度[比值比(OR)=1.79,95%可信区间(CI):1.19~2.69]、近1年未接受过HIV检测(OR=1.63,95%CI:1.03~2.60)、近3个月发生肛交的男性性伴数在3个以上(OR=1.84,95%CI:1.07~3.14),是MSM发生UAI的影响因素。结论北京市MSM中UAI普遍存在,应制定有效的干预策略和措施提高MSM中安全套的使用率,控制艾滋病及其他性传播疾病在该人群中的流行。
Objective To investigate the high risk behaviors of MSM and the influencing factors of unprotected anal intercourse (UAI) in Beijing. METHODS: From February to December 2014, MSM was recruited in Beijing to conduct face-to-face questionnaires and HIV / syphilis antibody tests. SAS 9.2 software was used for statistical analysis. Results A total of 528 MSM patients were investigated, and 90.0% (475) of them had anal intercourse with male partners over the past 3 months. The incidence of UAI was 47.6% (226/475). The prevalence of HIV and syphilis were 3.0% (16/528) and 18.0% (95/528). Multivariate logistic regression analysis showed that the educational level of college students [OR = 1.79, 95% confidence interval (CI): 1.19-2.69] and no HIV test in the past year (OR = 1.63, 95% CI: 1.03-2.60). The number of male partners who had anal intercourse in the past 3 months was more than 3 (OR = 1.84, 95% CI: 1.07-3.14), which was the influencing factor of UAI in MSM. Conclusions UAI in MSM is common in Beijing. Effective intervention strategies and measures should be developed to increase the condom use rate in MSM and to control the prevalence of AIDS and other sexually transmitted diseases in this population.