Department of Medicine, University of Chicago, Chicago, IL 60637, USA.
Am J Public Health. 2013 Jan;103(1):e28-36. doi: 10.2105/AJPH.2012.301003. Epub 2012 Nov 15.
We evaluated network mixing and influences by network members upon Black men who have sex with men.
We conducted separate social and sexual network mixing analyses to determine the degree of mixing on risk behaviors (e.g., unprotected anal intercourse [UAI]). We used logistic regression to assess the association between a network "enabler" (would not disapprove of the respondent's behavior) and respondent behavior.
Across the sample (n = 1187) network mixing on risk behaviors was more assortative (like with like) in the sexual network (r(sex), 0.37-0.54) than in the social network (r(social), 0.21-0.24). Minimal assortativity (heterogeneous mixing) among HIV-infected men on UAI was evident. Black men who have sex with men reporting a social network enabler were more likely to practice UAI (adjusted odds ratio = 4.06; 95% confidence interval = 1.64, 10.05) a finding not observed in the sexual network (adjusted odds ratio = 1.31; 95% confidence interval = 0.44, 3.91).
Different mixing on risk behavior was evident with more disassortativity among social than sexual networks. Enabling effects of social network members may affect risky behavior. Attention to of high-risk populations' social networks is needed for effective and sustained HIV prevention.
我们评估了网络成员对与男性发生性关系的黑人男性的网络混合和影响。
我们分别进行了社会网络和性网络混合分析，以确定风险行为（例如，无保护的肛交[UAI]）的混合程度。我们使用逻辑回归来评估网络“促进者”（不会不赞成受访者的行为）与受访者行为之间的关联。
在整个样本（n = 1187）中，性网络（r（sex），0.37-0.54）中的风险行为混合程度比社会网络（r（social），0.21-0.24）更为相似（相似者与相似者混合）。在 UAI 方面，感染艾滋病毒的男性之间几乎没有混合（混合不均）。报告社会网络促进者的与男性发生性关系的黑人男性更有可能进行 UAI（调整后的优势比= 4.06；95％置信区间= 1.64，10.05），而在性网络中未观察到这种情况（调整后的优势比= 1.31；95％置信区间= 0.44，3.91）。
风险行为的混合程度不同，社会网络比性网络的混合程度更不相似。社会网络成员的促进作用可能会影响危险行为。需要注意高危人群的社交网络，以实现有效的和持续的艾滋病毒预防。
