We determined whether racial disparities in HIV infection among gay and bisexual men (MSM) may be partially explained by racial differences in the HIV transmission potential (i.e. mixing of people living with HIV and people not living with HIV or of unknown HIV serostatus) and density (i.e. sex partner concurrency) of sexual networks. Data included a behavioral survey, testing for HIV, and an egocentric sexual network survey. Mixed effects logistic regressions were used for hypothesis testing. Black (vs. non-Black) MSM were more likely to not know their partner’s HIV serostatus (21.8% vs. 9.6%). Similar proportions reported sex partner concurrency (67.1% vs. 68.0%). In adjusted analyses, among Black MSM, sex partner concurrency significantly increased the odds of an HIV transmission potential partnership (TPP), and this association was not significant among non-Black indexes. The association between an HIV TPP and sex partner concurrency may help explain persistent racial disparities in HIV prevalence.

我们确定了男同性恋和双性恋男性 (MSM) 中 HIV 感染的种族差异是否可以部分解释为 HIV 传播潜力的种族差异（即 HIV 感染者与非 HIV 感染者或 HIV 血清状态未知的人的混合）和密度（即性伴侣并发）性网络。数据包括行为调查、艾滋病毒检测和以自我为中心的性网络调查。混合效应逻辑回归用于假设检验。黑人（与非黑人）MSM 更有可能不知道其伴侣的 HIV 血清状况（21.8% 与 9.6%）。相似的比例报告了性伴侣并发（67.1% vs. 68.0%）。在调整后的分析中，在黑人 MSM 中，性伴侣并发显着增加了 HIV 传播潜在伙伴关系 (TPP) 的几率，并且这种关联在非黑人指数中并不显着。HIV TPP 与性伴侣并发之间的关联可能有助于解释 HIV 流行率持续存在的种族差异。