Division of Health Promotion and Behavioral Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA.
Sex Transm Dis. 2013 Jun;40(6):453-8. doi: 10.1097/OLQ.0b013e31829186e5.
This study examined venue-based networks constituted by affiliation with gay bars and street intersections where male sex workers (MSWs) congregate to find their sexual/drug-sharing partners and network influence on risky sexual behavior (e.g., unprotected anal intercourse [UAI]) and HIV infection.
Data collected in 2003 to 2004 in Houston, Texas, consists of 208 MSWs affiliated with 15 gay bars and 51 street intersections. Two-mode network analysis was conducted to examine structural characteristics in affiliation networks, as well as venue-based network influence on UAI and HIV infection.
Centralized affiliation patterns were found where only a few venues were popular among MSWs, and these were highly interdependent. Distinctive structural patterns of venue-based clustering were associated with UAI and infection. Individuals who shared venue affiliation with MSWs who engage in UAI were less likely to have UAI themselves. This suggests a downhill effect; that is, individuals compensate for their risk of infection by adjusting their own risk-taking behavior, based on their perceptions of their venue affiliates.
Venue-based HIV/AIDs interventions could be tailored to specific venues so as to target specific clusters that are more likely to engage in risky sexual behavior.
本研究考察了由男同性恋者酒吧和性工作者聚集寻找性伴和性交易伙伴的街头街角构成的场所网络，以及这些网络对高危性行为（如无保护肛交）和 HIV 感染的影响。
2003 年至 2004 年在德克萨斯州休斯顿收集的数据包括 208 名与 15 家男同性恋酒吧和 51 个街角有关联的男男性工作者。采用双模网络分析方法，研究了关联网络中的结构特征，以及场所网络对无保护肛交和 HIV 感染的影响。
发现了集中的关联模式，只有少数几个场所受到男男性工作者的欢迎，而且这些场所高度相互依存。基于街头街角的聚类具有独特的结构模式，与无保护肛交和感染有关。与从事无保护肛交的男男性工作者有共同场所关联的个体，自己进行无保护肛交的可能性较小。这表明存在一种下坡效应，即个体根据自己对场所关联者的看法，通过调整自己的风险行为来弥补感染的风险。
可以根据特定场所量身定制基于场所的 HIV/AIDS 干预措施，以针对更有可能从事高危性行为的特定群体。
