Ouyang Lin, Feng Lian-gui, Ding Xian-bin, Zhao Jin-kou, Xu Jing, Han Mei, Zhou Chao
Chongqing Center for Disease Control and Prevention, Chongqing 400042, China.
Zhonghua Liu Xing Bing Xue Za Zhi. 2009 Oct;30(10):1001-4.
To examine HIV prevalence and related risk factors among men who have sex with men (MSM) in Chongqing, and to explore the feasibility of using respondent-driven sampling (RDS) in the survey.
Based on results from formative research, a RDS survey was designed and conducted to collect demographic, behavioral and serologic data. RDSAT was used to calculate point estimation and confidence intervals. SPSS was used for bi-variate analysis using RDSAT exported weighed data. NETDRAW was used to draw network diagram.
Among 617 subjects recruited, the adjusted HIV and syphilis prevalence rates were 16.8% and 10.9%, respectively. 73.0% of the subjects were 20 to 29 years old and 72.9% were officially registered residents of Chongqing. 83.4% were single, with the proportion of students the highest, accounting for 24.6%. During the last six months, 83.4% of them reported ever having anal sex, and 54.0% reported having unprotected anal sex.
This survey confirmed that Chongqing had a higher reported HIV prevalence among MSM than from other Chinese cities. Comprehensive intervention services were required to address this alarmingly high prevalence, with focus on intervention through internet and those having syphilis infection. RDS seemed one of the effective ways of recruiting hidden MSM populations in Chongqing which had a large population of active MSM who did not frequently visit MSM venues as compared with snowball method.
调查重庆市男男性行为者（MSM）中艾滋病病毒（HIV）感染率及相关危险因素，并探讨在该调查中采用应答者驱动抽样（RDS）方法的可行性。
基于前期形成性研究结果，设计并开展RDS调查，收集人口统计学、行为学及血清学数据。使用RDSAT计算点估计值和置信区间。运用SPSS软件对RDSAT导出的加权数据进行双变量分析。使用NETDRAW绘制网络图。
在招募的617名研究对象中，校正后的HIV感染率和梅毒感染率分别为16.8%和10.9%。73.0%的研究对象年龄在20至29岁之间，72.9%为重庆市户籍人口。83.4%为单身，学生比例最高，占24.6%。在过去6个月中，83.4%的研究对象报告有肛交行为，54.0%报告有无保护肛交行为。
本次调查证实，重庆市MSM人群中报告的HIV感染率高于中国其他城市。鉴于这一惊人的高感染率，需要提供综合干预服务，重点是通过互联网进行干预以及针对梅毒感染者。与滚雪球法相比，RDS似乎是在重庆招募隐匿MSM人群的有效方法之一，重庆有大量活跃的MSM人群，他们不常光顾MSM场所。
