不同招募场所的男男性行为者性网络特征研究

目的 了解哈尔滨市男男性行为者(men who have sex with men,MSM)性网络特征及艾滋病病毒(HIV)感染危险行为,探索MSM人群中HIV传播以及向一般人群传播的可能性.方法 选择黑龙江省哈尔滨市作为研究现场,招募场所分为酒吧或夜总会、浴室或桑拿、公园或公厕三类,同时安排志愿者通过社会网络招募MSM.从个人为中心的网络角度对性网络特征进行调查与分析.分析指标有个人网络的大小、密度、网络成员交往的相似程度(年龄和婚姻状况).结果 本次调查获得有效问卷647份,其中酒吧或夜总会229人、浴室或桑拿291人、公园或公厕36人,社会关系网络招募91人.调查对象过去6个月平均性伴网络大小为14人,最小网络密度为0.14;过去1年中,性伴关系维系比例为30.5%(647/2123);不同招募场所MSM性伴关系继续维持比例酒吧为22.8%(159/699),浴池35.9%(329/917),公园26.4%(28/106),社会网络招募32.7%(131/401),不同招募场所的MSM的性伴关系维系比较,差异有统计学意义(X~2=34.07,P<0.01),浴池的MSM平均性伴网络较大,为18人,过去1年性伴关系维系比例为35.9%(329/917).MSM与性伴之间在年龄和婚姻状况上的交往相似性Q值分别为0.03和0.41;过去6个月安全套坚持使用比例低,为40.9%(822/2012).结论 不同场所MSM人群性网络特征差别大.MSM与性伴之间的交往模式相似性较低,同时存在传播HIV的潜在危险.

Study on the characteristics of sexual networks for men who have sex with men recruited at different sites in Harbin

Objective To identify the characteristics of the sexual networks and HIV/AIDS related high-risk behaviors among MSM in Harbin city, and to evaluate the possibility of HIV transmission among MSM and from MSM to general population. Methods A face to face questionnaire investigation was conducted among 673 MSM aged above 18 years older from May to July,2006 in Harbin, Heilongjiang province. The Key-informant sampling and time-location sampling methods were used at different sites to recruit objectives, including bars, barthrooms, parks and social networks. Mixing matrices were computed based on the demographic characteristics of MSM and their sexual partners. Sexual networks analysis by egocentric methods, such as network size, density and sexual mixing patterns. Results A total of 647 questionnaires were completed. The number of them recruited from bars, bathrooms, parks and social networks were 229,291,36 and 91. The average size of sexual networks was 14 persons,the least network density was 0.14. The proportion of having sexual relationship in the past year was 30.5% (647/2123). Of which recruited at bars ,bathrooms ,parks and social networks, the proportions of having long-term relationship with their sex partners were 22. 8% (159/699) ,35.9% (329/917) ,26.4% (28/106) and 32.7% ( 131/401 ),respectively. There was statistical significance in MSM having sexual relationship with their partners atdifferent recruited places(X~2=34.07 ,P<0.01 ). Sexual networks of MSM from public bathroom was larger with an average number of 18. Only 35.9% ( 329/917 ) of them had long-term relationship with their sex partners. A tendency for age and marriage pairing to cluster around main diagonal suggesting that MSM were similar to chooseing sexual parterners in the respect of age and marriage status. The proportions of consistent condom use in the past 6 months were 40. 9% (647/2123). Conclusion MSM from different sites have greatly different sexual networks characteristics. Sexual mixing patterns are weakly assertive in the MSM and potential of HIV spread among MSM exists.