绵阳市县级MSM艾滋病防治网络行为干预效果

Effect of behavioral intervention via network among MSM for AIDS prevention and control at county level of Mianyang

目的评价县级男男性行为者(MSM)艾滋病防治网络行为干预效果。方法采用滚雪球抽样法,招募四川省绵阳市县级MSM进行行为学和血清学基线调查后,开展行为干预,间隔1年分别进行期中、终期评估调查,比较相关结果以评价效果。结果 3次调查人口学特征一致(均为P>0.05),近6月男性商业性行为、异性性行为呈下降趋势,男性肛交呈上升趋势,近1周肛交频率呈下降趋势(均为P<0.05)。近1次肛交安全套使用率、近6个月肛交安全套坚持使用率,分别从基线调查的77.3%、45.4%上升到终期评估的89.5%、62.4%,艾滋病病毒(HIV)、梅毒感染率,分别从基线调查的5.9%、6.7%下降到终期的3.4%、2.2%(均为P<0.05)。结论县级MSM艾滋病高危行为明显改变,HIV、梅毒流行趋势初步遏制,干预措施切实有效。

Objective To evaluate the effect of behavioral intervention via network among men who have sex with men（MSM）for AIDS prevention and control in counties of Mianyang city.Methods The study lasted one year with snowball sampling method to recruit MSM.The behavioral and serological survey was conducted as a baseline and followed by behavioral intervention.Then,another two rounds of surveys were conducted as interim and final evaluation after every six months.The results of the surveys were compared to show the effect of intervention.Results The demographic characteristics of MSM were consistent（both P 〉0.05）in the three surveys.Male commercial sex and heterosexual sex decreased,male anal sex rose in the last six months,and frequency of anal sex was declining in the last week（both P 〈0.05）.The condom use rates in anal sex last time and consistent use in the last six months rose from 77.3%and 45.4%in baseline survey,to 89.5%and 62.4%in the final evaluation respectively.The infection rates of HIV and syphilis decreased from 5.9% and 6.8% in baseline survey to 3.4% and 2.2%（both P〈 0.05）.Conclusion The risk behaviors among MSM at the county level have significantly changed after the intervention.The intervention measures are effective,and the HIV and syphilis epidemics seems to slow down preliminarily.