北京市大学生男男性行为人群HIV与梅毒感染相关流行病学调查

目的了解北京市大学生男男性行为人群(MSM)的艾滋病病毒(HIV)与梅毒的现患状况、艾滋病相关认知与行为。方法采用自填式问卷,调查社会人口学信息、艾滋病相关知识、同/异性性行为等,并进行HIV和梅毒的血清学检测。结果 157位调查对象,HIV、梅毒以及合并感染率分别为2.5%、7.0%和1.3%。由于同性性取向,5.1%有过自杀行为。近6个月曾与偶遇性伴发生过性行为者("419")约占到45%,其HIV和梅毒的感染率均高于无"419"行为者。不足20%曾发生异性性行为。结论大学生MSM中普遍存在HIV高危同性性行为,也存在异性性行为,亟须开展有效的健康教育和行为干预。     

北京市大学在校生男男性行为者HIV感染状况及其相关危险陛行为调查

目的 了解北京市大学在校生男男性行为者的HIV感染状况及其相关危险性行为.方法 研究对象主要通过网络招募,采用自填式问卷调查.问卷内容包括人口学信息与艾滋病相关危险行为等.问卷完成后采集血液样本进行HIV血清学检测.单因素分析采用X2检验,多因素分析采用logistic同归.结果 研究成功招募157人.平均年龄为(22.7±2.8)岁,少数民族占12.1%,77.7%自我认同为同性恋.98.1%曾有肛交行为,73.9%报告肛交是常采用的性行为方式.157人中近6个月有58.6%发生过无保护肛交,有58.0%口交时从不使用安全套,其中59.2%存在多性伴(性伴数≥2)行为.近50.0%认为自己不可能感染HIV或者风险很小,检测发现HIV阳性率为2.5%.logistic回归分析结果 显示,曾与陌生人发生性行为(OR=13.10)、了解"肛交时做主动方比做被动方感染HIV风险小"(OR=3.37)以及曾去同性恋酒吧(OR=2.49)是近6个月发生多性伴行为的独立危险因素.结论 大学在校生男男性行为者无保护肛交和多性伴行为较普遍.亟需开展有针对性的干预活动,预防HIV在该人群中传播.

Abstract：

Objective To assess the prevalence of HIV and risky sexual behaviors among university students who have sex with men(MSM)in Beijing.Methods MSM students in the universities were mainly recruited via internet.Questionnaires were self-administered to collect social demographic information and AIDS-related risky sexual behaviors.After completing the questionnaire,blood sample was collected to determine HIV infection through serological testing.X2 test and logistic regression were employed for univariate and multivariate analysis,respectively.Results A total of 157 students were recruited with mean age of 22.7±2.8 years old,12.1%of them were minorities and 77.7% were self-identified as homosexual.98.1% had engaged in anal intercourse(AI)in their lifetime and 73.9%reported that AI was common sexual behavior they often practised.In the past 6 months,58.6% had ever had unprotected anal intercourse(UAI),58.0% never used condoms during oral intercourse,and 59.2% had multiple sex partners(≥2).Nearly half of them believed that they were at low or no risk of contracting HIV and the prevalence of HIV infection was 2.5%.Data from logistic regression analysis showed that ever having had sex with a casual partner in a lifetime (OR=13.10).understanding that serving an insertive role had less risk than being receptive during the AI (OR=3.37),and ever having been to a gay bar(OR=2.49)was independently related to having multiple sex partners in the past 6 months.Conclusion Despite the extensive programs on education,behaviors regarding UAI and ever having had multiple sex partners were silll commonly seen among university MSM students.Interventions were needed to prevent HIV transmission in this population.     

北京市大学生男男性行为者HIV相关知信行定性调查

目的了解北京市大学生男男性行为者(MSM)HIV相关知识、态度与行为。方法通过网络招募调查对象,进行面对面访谈,并采集血样检测HIV和梅毒抗体。结果共调查男男性行为者27人,年龄中位数为23岁,21人自我认同为同性恋。调查对象HIV相关知识知晓率高,绝大多数不能坚持使用安全套,419(一夜情)行为常见,否认有吸毒史。12人从未进行HIV检测,6人曾感染性病。本次血清学检测未发现HIV阳性者,2例新近感染梅毒。结论大学生男男性行为者中普遍存在危险性行为,容易导致性病和HIV在该人群的流行,亟需开展有针对性的行为干预。     

北京市男男性行为者HIV新发感染率及影响因素研究

目的 了解北京市男男性行为者(MSM)HIV血清抗体阳转率的动态变化情况及影响因素.方法 2009年8-12月在北京市招募962名MSM,其中809名HIV阴性进入队列,每6个月随访检测HIV抗体,并进行体检和行为学问卷调查.结果 在招募的962名MSM中,HIV感染率为6.34％(61/962).对809名HIV阴性者在第6、12和18个月随访时,队列保持率分别为95.1％(769/809)、85.5％( 692/809)、71.0％ (574/809);HIV血清抗体阳转者分别为19、29和17例;HIV新发感染率分别为5.47/100人年、12.37/100人年、6.86/100人年.18个月随访期间的HIV新发感染率为7.59/100人年.多因素Cox回归模型分析显示,年龄≤25岁(HR=2.32,95％CI:1.39 ～3.87)、认识圈内的朋友数＞8个(HR=2.50,95％CI:1.49～4.20)、月经济收入＜2000元(HR=1.76,95％CI:1.06～2.95)、最近6个月男男性行为人数＞4人(HR=3.50,95％CI:2.11 ～5.81)、体检包皮为包茎或包皮过长或较长者(HR=2.47,95％CI:1.50～4.07)和梅毒检测结果阳性(HR=2.62,95％CI:1.53～4.49)同HIV新发感染的差异有统计学意义.结论 北京市MSM中HIV新发感染率较高,提示该人群中HIV在快速传播.