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[目的]了解上海市男男性行为人群(men who have sex with men,MSM)人类免疫缺陷病毒(HIV)感染相关行为学特征,并分析与男男无保护性行为相关的影响因素。[方法]利用信息网络中的上海市男男活动小组和男男论坛,共招募符合筛选条件的调查对象121名。采用中-加项目全球课题设计的统一表格对121人进行面对面问卷调查。[结果]调查对象平均年龄为(27.99±5.93)岁;大学及以上教育程度者占74.4%;月均收入≥3000元人民币者占62.9%;单身者占86.0%。121名MSM初次和男性发生性行为的平均年龄为(22.14±5.32)岁;过去半年内受访者的平均性伴数为(3.27±2.77)人。目前有固定男友的受访者占56.14%,但和固定男友之间在性关系上相互忠诚的仅占其中的36.84%。16人在过去半年内和女性有性行为,其中62.8%的受访者曾和女性发生过无保护性行为。45.45%的受访者曾与男性有过无保护性行为,受访者和固定男友间发生无保护性行为的比例高于和多次男性伴间发生无保护性行为的比例(χ2=4.32,P<0.05),也明显高于和偶遇男性伴间发生无保护性行为的比例(χ2=10.13,P<0.01)。77.7%的受访者认为自己有感染HIV的风险。多因素分析表明,与男性发生无保护性行为相关的影响因素为受教育程度、半年内性伴数量和HIV感染自我风险评估情况。[结论]受教育程度越低、性伴数量越多的MSM发生无保护性行为的概率越高。认为自己有HIV感染风险的受访者更有可能发生过无保护性行为。因此在今后对存在上述情况的MSM更应加强健康干预。
[Objective] To investigate the behavioral characteristics of human immunodeficiency virus (HIV) infection in men who have sex with men (MSM) in Shanghai and analyze the influencing factors related to unprotected male sex workers. [Methods] With the help of Shanghai Men’s and Men’s Activity Group and Men’s and Men’s Forum in the information network, a total of 121 respondents were recruited to meet the screening criteria. 121 face-to-face questionnaires were conducted using a unified form of Sino-Canadian project global project design. [Results] The average age of the surveyed subjects was (27.99 ± 5.93) years old, 74.4% of them had a college education or above, 62.9% of them had an average monthly income of more than 3000 yuan, and 86.0% of them were singles. The mean age at first sexual behavior of 121 MSMs was (22.14 ± 5.32) years old; the average sexual partner number of respondents in the past 6 months was (3.27 ± 2.77). At present, 56.14% of respondents have fixed boyfriends, but only 36.84% of them are loyal to their boyfriends. Sixteen people had sex with women during the past six months, with 62.8% of those interviewed having had unprotected sex with women. 45.45% of respondents had had unprotected sex with men, and the proportion of unprotected sex between respondents and regular boyfriends was higher than that of unprotected sex with multiple male partners (χ2 = 4.32, P <0.05), but also significantly higher than that of occasional males (χ2 = 10.13, P <0.01). 77.7% of respondents think they have the risk of HIV infection. Multivariate analysis showed that the factors associated with unprotected sex in men were educational level, number of sexual partners within six months, and self-risk assessment of HIV infection. [Conclusions] The lower the level of education and the higher the number of sexual partners, the higher the probability of unprotected behavior. Respondents who consider themselves at risk of HIV infection are more likely to have had unprotected sex. Therefore, in the future MSM with the above situation should strengthen the health intervention.