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目的了解南京地区男-男性行为(MSM)人群的性行为特征、人类免疫缺陷病毒(HIV)感染状况及影响因素。方法利用同伴推动抽样法招募MSM人群,进行人口学、HIV知识和行为学调查,并检测血清HIV抗体及梅毒,分析结果。结果804例MSM人群年龄(30.57±10.53)岁。艾滋病知识知晓率82.84%。近6个月有42.16%(339/804)MSM与非固定性伴发生同性性行为,58.08%(467/804)MSM与1个以上性伴发生同性性行为;在与非固定性伴发生性行为时,56.33%(249/442)的MSM存在不安全性行为,HIV感染率为8.21%(66/804),梅毒感染率为22.89%(184/804)。多因素Logistic回归分析结果表明,近6个月同性性伴数多,非固定同性性伴肛交安全套使用水平低和现症梅毒感染是影响HIV感染的危险因素。结论南京地区MSM人群HIV知识知晓率高,但具有多性伴、安全套使用率低的特点,HIV感染率高且尚未得到有效控制,应根据地区特点开展针对性的有效干预措施。
Objective To understand the characteristics of sexual behavior, human immunodeficiency virus (HIV) infection and its influencing factors in male-male behavior (MSM) population in Nanjing. Methods Companion-driven sampling method was used to recruit MSM population for demographic, HIV knowledge and behavioral investigation, and to detect serum HIV antibody and syphilis. Results were analyzed. Results The age of the 804 MSM population (30.57 ± 10.53) years old. AIDS awareness rate of 82.84%. In the recent 6 months, 42.16% (339/804) MSM had same-sex behavior with non-fixed partner, 58.08% (467/804) MSM had homosexual behavior with more than one sexual partner, 56.33% (249/442) MSM had unsafe behavior, HIV infection rate was 8.21% (66/804) and syphilis infection rate was 22.89% (184/804). Multivariate Logistic regression analysis showed that in the past 6 months, the number of same-sex sexual partners and non-same-sex sexual partners with condom use were low, and the prevalence of syphilis infection was a risk factor for HIV infection. Conclusions There is a high awareness rate of HIV knowledge among MSM population in Nanjing, but with characteristics of multiple sex partners and low condom use rate. HIV infection rate is high and not yet effectively controlled. Relevant and effective interventions should be carried out according to the regional characteristics.