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目的了解绵阳市男男性行为者(MSM)艾滋病病毒(HIV)/梅毒新发感染及行为变化。方法 2011年对2010年结合滚雪球抽样法建立的绵阳市MSM研究队列,进行血清学及行为学随访调查,采用广义估计方程进行相关行为变化分析。结果共随访调查243人,总随访率62.1%。HIV新发感染率为5.8/100人年,梅毒新发感染率为4.1/100人年,丙肝新发感染率为0.4/100人年。队列2011年与2010年调查相比,近6月性伴数大于1(waldχ2=7.586,P=0.005),近6月无保护性男性肛交(waldχ2=6.458,P=0.011)、无保护性女性性行为(waldχ2=4.241,P=0.039)比例呈下降,近6月性伴主要是男朋友(waldχ2=4.491,P=0.034)呈上升趋势;近1年做过HIV检测(waldχ2=44.384,P=0.000)、接受过预防性服务(waldχ2=8.837,P=0.003),知识信息来源于电视(waldχ2=5.380,P=0.020)、互联网(waldχ2=6.875,P=0.009)的比例呈上升,来源于医生(waldχ2=8.253,P=0.004)、宣传栏(waldχ2=4.151,P=0.042)比例呈下降趋势。结论绵阳市MSM HIV新发感染率较高,高危行为有所下降,应持续加大干预力度。
Objective To understand the new HIV / seropositive infections and their behaviors among MSM in Mianyang City. Methods In 2011, the Mianyang MSM research cohort, which was established by the snowball sampling method, was followed up for serological and behavioral studies. The generalized estimation equation was used to analyze the changes of relevant behaviors. A total of 243 follow-up survey results, a total follow-up rate of 62.1%. The new HIV infection rate was 5.8 / 100 person-years, the new infection rate of syphilis was 4.1 / 100 person-years, and the new infection rate of hepatitis C was 0.4 / 100 person-years. Compared with the 2010 survey, the number of sexual partners in the past 6 months was more than 1 (wald 2 = 7.586, P = 0.005) in 2011 and unprotected male anal in recent 6 months (wald 2 = 6.458, P = 0.011) (Wald 2 = 4.241, P = 0.039), the proportion of sexual partners (wald 2 = 4.241, P = 0.039) decreased in recent 6 months. (Wald 2 = 8.837, P = 0.009), the proportion of patients who received preventive services (wald 2 = 8.837, P = 0.003) The proportion of doctors (Wald 2 = 8.253, P = 0.004), Billboard (Wald 2 = 4.151, P = 0.042) showed a downward trend. Conclusions HIV infection rate of MSM in Mianyang City is high, and the high-risk behaviors of MSM in Mianyang City are declining. Intervention should be continued and intensified.