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目的了解男男性行为者(MSM)异地性行为现状,分析影响因素。方法 2016年2—11月,以四川省绵阳市辖区MSM为对象,采用滚雪球抽样法,在知情同意下,进行调查对象招募调查及血清学检测。结果合格调查1 073人中,有异地性行为者为6.7%。异地性行为地方为附近县的15.3%、绵阳34.7%、成都15.3%、省外等其他地区34.7%。每天平均性行为(1.6±1.038)次,偶然性伴72.1%、固定性伴27.9%。寻找性伴场所类型69.1%为网络型、11.8%为家庭型,肛交有保护性73.5%。异地性行为HIV感染率12.5%,高于无异地性行为的5.5%(P<0.05)。多因素分析,离异丧偶、本地居住时间短、生理需求为第一需求、最近1次肛交无保护性行为、近6个月肛交人数≥2发生异地性行为可能性较高(P均<0.05)。结论 MSM异地性行为以大中城市、网络型、偶然性伴为主,无保护、多性伴比例较高,增大了HIV感染和跨区域传播风险。
Objective To understand the status of heterosexual behavior of MSM and analyze the influencing factors. Methods From February to November of 2016, the MSM of Mianyang city in Sichuan Province was used as the object, and the snowball sampling method was used. With informed consent, survey and serological tests were conducted. Results Among the 1,073 persons who passed the survey, 6.7% had heterosexual behavior. Off-site sexual behavior is 15.3% in nearby counties, 34.7% in Mianyang, 15.3% in Chengdu and 34.7% in other areas outside the province. The average daily sexual activity (1.6 ± 1.038) times, occasional 72.1%, fixed sex with 27.9%. 69.1% were online, 11.8% were family, and 73.5% had anal sex. HIV prevalence among heterosexual couples was 12.5%, higher than 5.5% of sex without any difference (P <0.05). Multivariate analysis, divorced widowed, living in a short period of time, physical needs as the first demand, the last one anal unprotected sex, the past 6 months the number of anal sex ≥ 2 heterosexual behavior is more likely to have (P all <0.05) . Conclusion MSM heterosexual behavior in large and medium-sized cities, network-based, occasional sexual partners, unprotected, high proportion of multiple sexual partners, increasing the risk of HIV infection and inter-regional transmission.