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目的了解广州市男男性行为者(men who have sex with men,MSM)的同伴社会网络特征,应用个人社会网络分析方法探讨MSM同伴社会网络特征与高危性行为的关系。方法 2014年2月—2014年5月通过广州MSM社区组织门诊点对MSM进行招募,并采用面对面的问卷访谈方式调查其同伴社会网络成员特征和近三个月高危性行为情况,利用多因素logistic回归分析方法分析MSM同伴社会网络特征与高危性行为之间的关系。结果共招募397名男男性行为者(核心成员,ego),最近三个月与不同性伴发生无保护性肛交(unprotected anal intercourse,UAI)的频率分别为:固定性伴58.7%、临时性伴47.1%、任何性伴55.2%。397名MSM核心成员总共提名670名网络其他成员(alter),社会网络大小为1.7±0.7,社会网络密度为0.2±0.2。在校正了核心成员的基本情况等因素后,MSM同伴社会网络特征与近三个月和固定性伴发生UAI的关系有统计学意义的变量为:社会网络大小(OR=1.53,95%CI:1.15~2.04)、物质支持(OR=1.09,95%CI:1.02~1.17)、网络其他成员近3个月与固定性伴有UAI(OR=1.008,95%CI:1.003~1.014)、网络其他成员鼓励核心成员使用安全套可能性大(OR=0.992,95%CI:0.986~0.998)、网络其他成员自身使用安全套可能性大(OR=0.993,95%CI:0.988~0.997);在校正了核心成员的基本情况等因素后,MSM同伴社会网络特征与近三个月和任何性伴发生UAI的关系有统计学意义的变量为:网络其他成员近3个月与固定性伴有UAI(OR=1.008,95%CI:1.003~1.014)、网络其他成员鼓励核心成员使用安全套可能性大(OR=0.994,95%CI:0.989~1.000)、网络其他成员自身使用安全套可能性大(OR=0.995,95%CI:0.991~1.000)。结论同伴社会网络与MSM高危性行为的发生有关,社会网络成员的高危性行为模式和态度是MSM频繁发生高危性行为的重要影响因素。
Objective To understand the social network characteristics of fellow men who have sex with men (MSM) in Guangzhou and to explore the relationship between MSM fellow social network characteristics and high-risk behaviors by using personal social network analysis. Methods From February 2014 to May 2014, MSM was recruited through Guangzhou MSM community outpatient clinic. The characteristics of social network members and high-risk behaviors in the past three months were investigated by face-to-face questionnaire interview. Multivariate logistic Regression Analysis Analyzes the Relationship between MSM Peer Social Network Characteristics and High Risk Sexual Behavior. Results A total of 397 MSM (core members, ego) were enrolled. The frequency of unprotected anal intercourse (UAI) with different partners in the last three months was 58.7% for fixed sex partners, temporary partners 47.1%, any partner 55.2%. A total of 397 MSM core members nominated a total of 670 other members of the network (alter), with a social network size of 1.7 ± 0.7 and a social network density of 0.2 ± 0.2. After adjusting for the basic situation of the core members and other factors, the social network characteristics of MSM and the statistic significance of UAI in the last three months and the regular partners were: Social network size (OR = 1.53, 95% CI: (OR = 1.09, 95% CI: 1.02-1.17). The other members of the network had UAI (OR = 1.008, 95% CI: 1.003-1.014) Members were more likely to use condoms among core members (OR = 0.992, 95% CI: 0.986-0.998). Other members of the network were more likely to use condoms (OR = 0.993, 95% CI: 0.988-0.997) Members of the basic conditions and other factors, MSM peer social network characteristics and nearly three months and any sexual partners UAI statistically significant relationship between variables: the other members of the network nearly 3 months with fixed UAI (OR = (OR = 0.994, 95% CI: 0.989-1.000). Other members of the network were more likely to use condoms (OR = 0.995, 95% CI: 1.003-1.014). Other members of the network were more likely to encourage core members to use condoms 95% CI: 0.991-1.000). Conclusion Companion social network is related to the occurrence of high-risk sexual behaviors of MSM. High-risk sexual behaviors and attitudes of social network members are important influencing factors of MSM frequent high-risk sexual behaviors.