Bisexual Behaviors and Related Influencing Factors among Men Who Have Sex with Men

[Objective] To understand occurrence of bisexual behaviors and other acquired immune deficiency syndrome(AIDS) related high-risk behaviors among men who have sex with men(MSM),to analyze possible causes and influencing factors to provide suggestions for improving intervention against AIDS related high-risk behaviors.[Methods]A cross-sectional survey was conducted to collect information including demographic characteristics,working and living conditions,social networks and sexual behaviors,knowledge and attitude on AIDS among eligible MSM who were interviewed face to face from June to December,2010.[Results]A total of 158 MSM were eligible subjects according to the screening criteria,among whom 66.5%(105/158) were from regions outside Shanghai.A significant difference was found in the proportions between MSM who reported having sex with female partners in past 5 years(17.7%,28/158) and MSM who reported to be bisexual(27.8%,44/158)(χ2=4.60,P0.05).Among the MSM who had sex with female partners,the rate of consistent condom use in the past 6 months was 53.3%(8/15) and the rate of condom use in last sexual intercourse was 80.0%(12/15).The non-conditional logistic regression analysis showed that marriage(OR=10.53,95%CI: 3.07-36.13) and sexual orientation status(OR=82.86,95%CI: 16.35-419.86) were the significant factors that influenced bisexual behaviors among MSM.[Conclusion]Bisexual behavior is a main cause of HIV transmission from MSM to general population.Some MSM having marital sex with female due to pressure from society and family may promote HIV transmission.Social and family supports,therefore,are very important to HIV prevention in MSM.