重庆市网络型与非网络型男男性行为人群HIV、梅毒、丙肝感染率及其相关行为特征比较研究

目的了解网络型与非网络型男男性行为人群（MSM）HIV、梅毒、丙肝感染率及其相关的行为特征，为开展有针对性的干预工作提供建议。方法通过滚雪球的方式招募MSM人群进行面对面的问卷调查和采集血样检测HIV、梅毒、丙肝。对比分析网络型与非网络型MSM人群的一般人口学、行为特征以及H1V、梅毒、丙肝感染率。结果共调查了网络型MSM587人和非网络型MSM358人。网络型MSM人群较非网络型MSM年龄较小、文化程度较高、未婚比例较大、艾滋病防治知识知晓率高、自我同性性取向认同度好。非网络型MSM最近6个月与男性发生肛交时发生无保护性性行为的比例、买性史、卖性史以及与女性发生性行为的比例均高于网络型MSM（70．6％vs61．3％）、（6．2％vs51．4％）、（14．4％vs3．4％）、（32.4％vs10．7％）。非网络型MSM最近1次以及最近6个月与女性发生性行为时，安全套使用率低于网络型MSM（28．4％vs54．0％）和（21．6％vs46．0％）。网络型与非网络型MSM人群HIV感染率都较高，分别为14．7％（4．5％～24.8％）和17．6％（0．6％～34．6％），但差异无统计学意义。自报性病感染率非网络型MSM高于网络型MSM（22．1％ws16．7％，χ^2=4．22，P=0．04）。结论网络型与非网络型MSM人群HIV感染率均较高。非网络型较网络型MSM人群艾滋病防治知识知晓率低、与男性发生肛交时无保护性性行为比例更高、与女性发生性行为时安全套使用率更低，这部分人群感染艾滋病的危险性更大，是艾滋病由MSM人群向一般人群传播的重要桥梁人群，因此，探索针对网络型与非网络采取不同的干预措施将是当前MSM人群艾滋病防治的迫切任务。

Study on HIV, Syphilis and HCV Prevalence and Its Associated Factors among lnternet MSM Comparison to Non-Internet MSM in Chongqing

Objective To examine the prevalence of HIV, syphilis and HCV and its associated factors among internet MSM and non-internet MSM is to provide the suggestion for implementing the intervention against MSM. Methods MSM recruited through snowballing were investigated by face-to-face. Blood sample were taken to test HIV, Syphilis and HCV antibody. The demographic, behavior feature and prevalence of HIV, Syphilis and HCV were compared between internet MSM and non-internet MSM. Results A total of 587 internet MSM and 358 non-internet MSM were recruited. Internet MSM were younger, high education level, more single, better cognition about AIDS and better self-approval of sexual orientation than non-internet MSM. The proportion of non-protection anal sex, buying sex and selling sex with men in the last six months and having sex with women in the last six months among non-internet MSM was higher than it among interact MSM. It was （70.6% vs 61.3%）, （6.2% vs 1.4%）, （14.4% vs 3.4%） and （32.4% vs 10.7%）o HIV prevalence was 14.7%（4.5%-24.8%） and 17.6% （0.6%-34.6%） among internet MSM and non-internet MSM respectively. The prevalence of STD self-reported among non-internet MSM was significant higher than it among internet MSM （22.1% vs 16.7% ,χ^2=4.22,P=0.04）. Conclusion HIV prevalence among two groups of MSM was high. The factors such as poor cognition about AIDS, high proportion of non protection anal sex with men, and low rate of condom use with women put them risk on HIV infection. Moreover, non-internet MSM will play an important role on AIDS transmission from MSM to general population. It is urgent to explore the effective measure against different subgroup MSM.