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Agreements about sex with outside partners are common among gay couples, and breaks in these agreements can be indicative of HIV risk. Using longitudinal survey data from both partners in 263 HIV-negative and -discordant gay couples, we investigate whether relationship dynamics are associated with broken agreements. Twenty-three percent of respondents reported broken agreements. Partners with higher levels of trust, communication, commitment, and social support were significantly less likely to report breaking their agreement. Promoting positive relationship dynamics as part of HIV prevention interventions for gay couples provides the opportunity to minimize the occurrence of broken agreements and, ultimately, reduce HIV risk.

A substantial number of new HIV infections among gay, bisexual, and other men who have sex with men and transgender women occurs in the context of primary partnerships. Given the diversity of risk reduction needs and various approaches available for reducing risk within couples, condomless sex is no longer the gold standard HIV outcome. We present a novel, comprehensive, and flexible Composite Risk for HIV (CR-HIV) approach for integrating evolving biomedical and behavioral HIV prevention strategies into couples-based HIV prevention intervention and survey research. We provide illustrative examples of the utility of the CR-HIV approach based on couples' HIV status.