男男性接触者性伴交往模式及行为特征研究

Study on the patterns of sexual contact and behavioral features of men who have sex with men

目的了解男男性接触者（MSM）性伴交往模式以及行为特征，分析流行的潜在危险。方法采用横断面调查方法，2006年6—7月对哈尔滨市673名符合设计要求的MSM进行面对面的问卷调查，利用交往矩阵分析调查对象与性伴之间的人口学特征，并拟合不同的模型。结果调查获得有效问卷648份，MSM与性伴之间在年龄和婚姻状况上的交往相似性Q值分别为0．03和0.41，不同场所的MSM与性伴之间在年龄和婚姻状况上相似性Q值有差异；不同的模型拟合发现，MSM对性伴年龄和婚姻状况的选择上有聚集性，同时年龄小的MSM倾向于有年龄大的相伴，且安全套使用率低；MSM性伴数多，性伴更换频率高；不同年龄组的安全套坚持使用率不同（X^2=76．22，P〈0.001），15～24岁年龄组安全套坚持使用率较高为50．9％，同时该年龄组的MSM与性伴之间商业性性行为比例最高，为22．5％。结论MSM与性伴之间的交往模式具有一定程度的相似性，同时存在传播HIV的潜在危险。

Objective To study the patterns of sexual contact and behavioral features of men who have sex with men（MSM） and to analyze the related potential risk＇. Methods A face to face interview with a standardized questionnaire was conducted on 673 MSM from May to July, 2006 in Haerbin, Heilongjiang province. Mixing matrices were computed based on characteristics of MSM and their sexual partners and different models were used for goodness-of-fit. Results 648 questionnaires were completed. Age and marriage status of sexual contact patterns were assertive with values of Q which were found to be 0.03 and 0.41, respectively. Values of Q showed big difference according to age and marriage status of sexual mixing Patterns among different sites. A tendency for age and marriage pairing in clustering around main diagonal （table 5, table 6） suggested that MSM and their partners were similar in ages and marriages while young MSM tend to have older partners. Most of the MSM had large number of sexual partners and frequently changing their sexual partners. The proportions of consistent condom use changed greatly （X^2 = 76.22, P 〈 0. 001） over time with the proportions of consistent condom use and commercial sex behaviors among 15-24 age groups of 50.9 % and 22.5 %, respectively. Conclusion Among MSM, sexual mixing patterns were weakly assertive, suggesting potential HIV transmission risk did exist since high risk behavior often occurred among MSM and their sexual partners.