男-男性行为者的行为特征分析

Behavioral Features of Men Who Have Sex with Men

目的 通过对男 -男性行为者 (m en who have sex with m en,MSM)行为监测 ,了解该群体与艾滋病相关的行为特征 ,为评估艾滋病在该人群的流行趋势提供依据。方法 2 0 0 3年 9月至 12月 ,同时在成都和南充两市进行监测 ,采用专门设计的问卷收集行为资料 ,采用方便样本法和“滚雪球”法 ,从 5类 MSM最常活动的场所中抽取调查对象。结果 大部分 MSM的性伴类型为男性性伴 ,最常见的性行为方式是肛交、口交和相互手淫。多性伴情况普遍存在 ,肛交和口交的性伴数中位数分别为 4 .4人和 4 .2人。近 6个月性活动中 ,有 4 91人 (84 .7% )与男性性伴发生过肛交 ,其中与不付费的固定和非固定性伴发生肛交的比例分别是 6 8.6 %和 6 6 .2 % ,明显高于与商业性性伴肛交的比例 (2 0 .4 % )。与不付费固定和非固定、以及付费性伴肛交时坚持使用安全套的比例分别为 15 .8%、16 .3%和 32 .3%。 MSM中最近 1年曾经有过毒品注射的人为 1.9% ,曾经自愿检测过 HIV的人为 18.3%。结论 MSM群体中 HIV传播的危险行为是广泛存在的 ,这些行为包括多性伴、无保护肛交、商业性性活动、以及注射吸毒行为等。

Objective This behavioral surveillance survey in Sichuan province was aimed to gain an insight into the behavioral features related to HIV prevalence among men who have sex with men (MSM). Methods The pilot survey was initiated in the year from September to December, 2003. Two cities, Chengdu and Nanchong, were selected as the surveillance sites. All behavioral data were collected by a special questionnaire. Convenience sampling and snowball sampling techniques were applied to recruit participants in 5 types of places where MSM appeared more often. Results Most of the participants sexed only with male partners, and the most common ways of intercourse for MSM were anal sex, mouth sex and masturbation. The cases of multiple sex partners existed generally in MSM. The median partner numbers for anal sex and mouth sex were 4.4 and 4.2 respectively. There were 491 MSM (84.7%) who had sexed with male partners 6 months before, in which 68.6% of them sexed with non-commercial regular male partners, 66.2% with non-commercial non-regular male partners, and 20.4% with commercial male partners. Condom use with different male partners varied significantly. The proportions of consistent condom use with non-commercial regular, non-commercial non-regular, and commercial male partners were 15.8%, 16.3% and 32.3% respectively. 1.9% of participants reported they had had the experience of injecting drug and 18.3% of participants reported they had been tested for HIV antibody 12 months before. Conclusion High risk behaviors such as multiple sex partners, unprotected anal sex, commercial sex, and injecting drug use among the MSM population in the two cities were unveiled broadly.