南京市男男性行为人群艾滋病感染情况及其影响因素

Analysis on HIV prevalence and related risk factors among men who have sex with men in Nanjing

目的了解南京市男男性行为人群艾滋病感染情况及影响因素,为针对性开展艾滋病防治工作提供参考。方法采用知情同意的原则,在南京市MSM社区使用滚雪球法,招募MSM进行问卷调查,抽取血样检测HIV和梅毒。采用多因素logistic回归进行分析。结果共调查566名MSM,34.10%性角色以插入式肛交为主,26.50%以被插入式肛交为主,39.40%两者兼有。最近1次与男性发生肛交时安全套使用率为63.07%,最近6个月肛交每次使用安全套的比例为41.34%。20.49%曾发生异性性交。MSM人群HIV感染率为9.54%,梅毒感染率为6.01%。多因素logistic回归分析显示,年龄〉22岁（OR=3.26,95%CI：1.23~8.60）、非本省户籍（OR=2.38,95%CI：1.31~4.30）、最近6个月无保护性肛交（OR=1.94,95%CI：1.03~3.68）、性角色为被插入方（OR=3.29,95%CI：1.43~7.57）以及双重角色（OR=2.34,95%CI：1.08~5.10）、近1年曾被诊断患过性病（OR=2.56,95%CI：1.12~5.89）是HIV感染的影响因素。结论南京市MSM无保护性行为发生率高,艾滋病感染率已达一定水平,应及时采取有效干预措施。

Objective To investigate HIV prevalence and related-risk factors among men who have sex with men（MSM）in Nanjing;to provide basis for carrying out targeted AIDS prevention measures.Methods Under the principle of informed consent,MSM were recruited for a face to face questionnaire survey and serological test for HIV and syphilis by snowball sampling method from communities in Nanjing.Multivariate logistic regression method was used for data analysis.Results A total of 566 MSM were recruited as surveyed subjects,in which 34.10% mainly played as inserting partners in anal sexual intercourse,while 26.50% were mainly receptive partners and 39.40% played double roles.63.07% used condom in the last homosexual anal intercourse while only 41.34% used condom every time in the past 6 months.20.49% of subjects had heterosexual intercourse.9.54% of subjects were infected with HIV,while 6.01% were infected with syphilis.Multivariate logistic regression analysis showed that〉22 years old（OR=3.26,95%CI：1.23~8.60）,non-local household registration（OR=2.38,95%CI：1.31~4.30）,unprotected anal sexual intercourse in past 6months（OR=1.94,95%CI：1.03~3.68）,receptive partners（OR=3.29,95%CI：1.43~7.57）,double roles in anal sexual intercourse（OR=2.34,95%CI：1.08~5.10）,being diagnosed with a sexually transmitted disease in past year（OR=2.56,95%CI：1.12~5.89）were risk factors of HIV infection.ConclusionUnprotected anal sexual intercourse is common in Nanjing.HIV infection reached a certain level,effective intervention measures should be taken in time.