重庆地区男男性行为人群多性伴行为特征及影响因素

目的  了解重庆地区艾滋病病毒(human immunodeficiency virus, HIV)阴性多性伴肛交(≥5人)男男性行为者(men who have sex with men, MSM)的人口学和性行为特征及其影响因素。 方法  从2018年6月至2019年6月, 招募重庆地区319名HIV阴性MSM, 收集其人口学特征、近半年内安全套使用率、是否感染性病、性角色、药物滥用史、是否服用过暴露后预防(post-exposure prophylaxis, PEP)药物、是否关注HIV知识和是否服用过暴露前预防(pre-exposure prophylaxis, PrEP)药物等信息。采用单因素和多因素Logistic回归分析模型分析MSM人群多性伴肛交的影响因素。 结果  319名HIV阴性MSM中, 34.5%(110/319)近6个月内性伴人数≥5人; 110名多性伴MSM中, 63.6%(70/110)年龄≤28岁, 75.4%(83/110)学历为大学本科或大专; 50名报告情感状况的MSM中, 72.0%(36/50)为单身。多因素Logistic回归分析模型分析显示, 服用过PEP药物和经常关注HIV知识是MSM多性伴肛交的主要影响因素。 结论  重庆地区HIV阴性MSM人群普遍存在多性伴肛交现象。应加大对MSM人群, 尤其是低龄MSM人群, HIV防治知识的宣教力度。在推广PrEP和PEP在MSM人群中的使用时, 应警惕其相关风险补偿。

Behavioral characteristics and influencing factors of multiple sexual partners among men who have sex with men in Chongqing

  Objective  To understand the demographic and sexual behavioral characteristics and factors associated with multiple anal sexual partners(5 or more) among human immunodeficiency virus(HIV) negative men who have sex with men(MSM) in Chongqing.  Methods  From June 2018 to June 2019, eligible HIV negative MSM were recruited in our analysis. Based on questionnaire, we collected demographic characteristics, the percentage of condoms using, the status of sexually transmitted diseases, sex role, history of drug abuse, history of post-exposure prophylaxis(PEP), concerning about HIV knowledge and history of pre-exposure prophylaxis(PrEP) in the past 6 months. Univariate and multivariate Logistic regression models were used to analyze the factors associated with multiple anal sexual partners(5 or more) among HIV negative MSM.  Results  Among 319 HIV negative MSM, 34.5%(110/319) of them had sex with 5 or more in the past 6 months. Among 110 MSM who have anal sex with 5 or more, 63.6%(70/110) of them were 28-year-old or younger, and 75.4%(83/110) of them had bachelor or college degree. 50 MSM reported emotional status, of which 72.0%(36/50) were single. The results of multivariate Logistic analysis showed that having a history of PEP and always concerning about HIV knowledge were primary influencing factors of multiple anal sexual partners(5 or more) among HIV negative MSM.  Conclusions  Having multiple anal sexual partners is a common phenomenon among HIV negative MSM in Chongqing. It is necessary to increase the awareness of HIV prevention and education among MSM populations, especially among younger MSM populations. While promoting the use of PrEP and PEP in MSM populations, we should be vigilant about the risk compensation of them.