School of Public Health, University of California, Berkeley, California, USA.
Sex Transm Infect. 2011 Dec;87(7):616-20. doi: 10.1136/sextrans-2011-050103. Epub 2011 Oct 7.
To measure sexual mixing among racial groups of men who have sex with men (MSM).
The authors explore its potential impacts, making two methodological advancements over previous work. First, the authors pioneer the use of Newman's assortativity coefficient to characterise mixing among MSM. Second, the authors examine mixing at the level of primary ties and at the level of secondary ties.
Results from the 1142-participant sample suggest that MSM are highly assortative by all races at the secondary level.
Networks of MSM may be more tightly contracted around racial groupings than previously supposed. These groupings may lead to increased HIV transmission in certain racial groups.
衡量男男性行为者（MSM）中不同种族群体之间的性混合。
作者探索了其潜在影响，并在以往工作的基础上进行了两项方法学上的改进。首先，作者首创使用 Newman 的配分系数来描述 MSM 之间的混合。其次，作者在主要关系和次要关系层面上检验了混合。
来自 1142 名参与者的样本表明，在次要层面上，所有种族的 MSM 都是高度配分的。
MSM 的网络可能比以前认为的更紧密地围绕着种族群体收缩。这些群体可能会导致某些种族群体的 HIV 传播增加。
