Changes in Sleep Quality and Associated Health Outcomes among Gay and Bisexual Men Living with HIV.

: Although gay, bisexual, and other men who have sex with men (GBMSM) bear a disproportionate burden of HIV in the U.S., they are underrepresented in HIV-related sleep research. This study sought to (a) investigate changes in self-reported sleep quality among a sample of GBMSM living with HIV during participation in an online sexual risk reduction intervention and (b) examine whether changes in sleep quality predicted later health outcomes.: Men ( = 505) completed measures of sleep quality, psychological distress, condom use self-efficacy, and antiretroviral therapy (ART) adherence. Analyses focused on data obtained from participants as part of the eligibility survey, baseline assessment, and the 9- and 12-month follow-up assessments.: Most participants did not report changes in their sleep quality (i.e., 50.1% maintained good sleep quality, 22.8% maintained poor sleep quality) between study screening and 9-month follow-up. Nevertheless, 17.0% indicated improved sleep quality and 10.1% indicated a negative change in sleep quality. Compared to those who maintained good sleep quality during the study, men whose sleep quality declined by 9 months reported significantly greater symptoms of depression and anxiety, as well as lower ART adherence and condom use self-efficacy at 12 months. Similarly, men who maintained poor sleep quality reported greater symptoms of depression and anxiety at 12 months. Men whose sleep quality improved reported better mental health than those with poor or worsening sleep quality.: Findings suggest that optimizing sleep health should be prioritized in interventions aimed at improving overall well-being of GBMSM living with HIV.