Williams Mark L, Bowen Anne M, Timpson Sandra, Blair Keel K
Center for Health Promotion and Prevention Research, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas 77030, USA.
Sex Transm Dis. 2003 Jul;30(7):571-4. doi: 10.1097/00007435-200307000-00008.
Drug-using male sex workers (DUMSWs) are known to have large numbers of drug injection and sex partners.
The purpose of this study was to describe the assortative and disassortative drug injection and sexual mixing patterns of DUMSWs. Implications of the high rates of disassortative mixing patterns of DUMSWs for HIV infection are discussed. Implications of disassortative mixing of DUMSWS with regard to DUMSWs bridging disparate HIV risk groups are evaluated.
Data were collected from 89 DUMSWS. Data on up to six drug injection and six sex partners were collected from respondents. One hundred drug injection and 169 sex respondent/partner pairs were analyzed for the proportions of pairs that were concordant (like) or discordant (unlike) in gender, trading sex for money, race/ethnicity, and age cohort. For race/ethnicity and age, within-group differences were assessed with chi-square statistics.
Data showed high proportions of discordant respondent/partner pairs for both drug injection and sex by gender, trading sex for money, race/ethnicity, and age. Significant within-group differences in rates of discordant pairs were found for both behaviors in relation to race/ethnicity and age. Minority persons and respondents 19 years of age or younger were more likely to be in discordant pairs.
Direct assessment of HIV risk posed by the mixing patterns was not possible. Elaborating the mechanisms by which DUMSWs might act as an epidemiologic bridge is complex and involves more variables than were explored in this study. Nevertheless, such a study would be worthwhile.
已知吸毒男同性恋性工作者（DUMSWs）有大量的药物注射和性伴侣。
本研究的目的是描述DUMSWs在药物注射和性行为方面的选择性和非选择性混合模式。讨论了DUMSWs非选择性混合模式的高发生率对艾滋病毒感染的影响。评估了DUMSWs与不同艾滋病毒风险群体建立联系时非选择性混合的影响。
从89名DUMSWs收集数据。从受访者那里收集了多达六个药物注射和六个性伴侣的数据。对100对药物注射和169对性受访者/伴侣进行分析，以确定在性别、以性换钱、种族/民族和年龄组方面一致（相似）或不一致（不同）的伴侣对的比例。对于种族/民族和年龄，使用卡方统计评估组内差异。
数据显示，在性别、以性换钱、种族/民族和年龄方面，药物注射和性行为的受访者/伴侣不一致对的比例都很高。在种族/民族和年龄方面，两种行为的不一致对发生率在组内存在显著差异。少数族裔人士和19岁及以下的受访者更有可能处于不一致对中。
无法直接评估混合模式所带来的艾滋病毒风险。详细阐述DUMSWs可能作为流行病学桥梁的机制很复杂，涉及的变量比本研究中探讨的更多。然而，这样的研究是值得的。
