男男性行为人群与男性性伴和女性性伴的性行为特征及影响因素

  目的  了解安徽省男男性行为人群（men who have sex with men，MSM）与其男性性伴和女性性伴的性行为特征及影响因素。  方法  以合肥、芜湖和六安3个城市为研究现场，采用滚雪球法和网络招募法招募MSM人群，对符合纳入标准的MSM进行匿名问卷调查。采用多因素Logistic回归分析模型分析MSM人群最近6个月发生异性性行为的危险因素。  结果  共招募1 200名MSM，最近6个月78.3% MSM与男性性伴有过肛交性行为，20.9%与女性性伴有过异性性行为，16.5%最近6个月与男性性伴、女性性伴均有过性行为。最近6个月异性性行为中的安全套坚持使用率（29.9%）明显低于同性性行为的安全套坚持使用率（53.0%），在最近一次异性性行为中的安全套使用率（52.2%）也明显低于同性性行为中的安全套使用率（79.6%）（均有P < 0.05）。多因素分析结果显示，已婚（包括在婚/同居/离异/丧偶）、在调查城市居住时间>2年、有同性商业性行为的MSM更容易发生异性性行为。  结论  MSM人群存在较高比例的双性性行为，且安全套坚持使用率较低，应该加强对他们的性健康教育、风险感知教育和行为干预。

Characteristic of sexual behavior and their associated factors among male and female partners of men who have sex with men

  Objective  To understand the characteristic of sexual behavior and their associated factors among male and female partners of men who have sex with men in Anhui province.  Methods  Cross-sectional studies were conducted among MSM in Hefei, Wuhu and Liuan in Anhui province. MSM were recruited through "snowball sampling" and "internet-based recruiting", and eligible participant received an anonymous survey. Multivariate Logistic regression analysis model was used to identify risk factors associated with having sex with women in the last 6 months among MSM.  Results  Of the 1 200 MSM interviewed, 78.3% had anal sex with men, and 20.9% had vaginal intercourse with women, and 16.5% had sexual intercourse with both men and women in the past 6 months. Less MSM reported using condom every time with women (29.9%) in the past 6 months than with men (53.0%), and less reported using condom with women (52.2%) during the last sexual intercourse than with men(79.6%) (all P < 0.05). The results of mutivariate Logistic regression analysis showed that MSM who were married(including currently married/cohabitating/divorced/widowed), lived more than 2 years in the surveyed city, and had commercial sex with men were more likely to have sex with women.  Conclusions  There was a high proportion of bisexual behavior and low rate of condom use among MSM. It should strengthen the sexual health education, risk perception education and behavioral intervention among MSM.