Objective To evaluate group sex behavior and related influencing factors among men who have sex with men(MSM)and provide a reference for formulating targeted strategies for HIV/AIDS prevention and control.Methods MSM were recruited in six cities in Shandong Province from April to July 2022.A face-to-face questionnaire was implemented to collect demographic characteristics,and behaviors of the high-risk population.Blood specimens were collected for HIV and syphilis antibodies detection.Results A total of 2 334 MSM were included in the study with the following characteristics:age,31.2±9.7 years;unmarried or divorced,1 773(76.0％);and with undergraduate degree or higher,1 454(62.3％).Of all participants,43.6％(n=l 018)self-identified as having no or low risk of HIV infection,and 16.0％(n=373)had used synthetic drugs.HIV and syphilis antibody positive rates were 3.4％(n=80)and 4.4％(n=103),respectively.A total of 19.7％(n=459)had group sex,and 51.2％(n=1 196)had consistently used condoms during homosexual intercourse in the recent 6 months.On multivariate Logistic regression analysis,MSM who had group sex behaviors in the past 6 months were more likely to be unmarried,divorced,or widowed(OR=1.45,95％CI:1.04-2.04),registered residence in another province(OR=1.43,95％CI:1.02-2.00),the main partner of anal sex was a commercial or temporary partner(OR=3.32,95％CI:2.13-5.20;OR=1.53,95％CI:1.20-1.97),had unprotected anal sex in the last 6 months(OR=1.35,95％CI:1.27-1.44),ever used synthetic drugs(OR=1.58,95％CI:1.44-1.76)and had suffered from sexually transmitted diseases in the previous year(OR=2.17,95％CI:1.54-3.03).Conclusions The proportion of MSM in Shandong Province who engage in group sexual activities is relatively high,indicating a broad presence of high-risk behaviors.It is important to strengthen surveillance and effective intervention programs for MSM who had group sex.
HIVmen who have sex with men(MSM)group sexhigh-risk behavior
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