Background Fewer than 70% of people living with HIV (PLHIV) in the United States have achieved durable viral suppression. To end the HIV epidemic in the United States, clinicians, researchers, and public health practitioners must devise ways to remove barriers to effective HIV treatment. To identify PLHIV who experience challenges to accessing healthcare, we created a simple assessment of social determinants of health (SDOH) among PLHIV and examined the impact of cumulative social and economic disadvantage on key HIV care outcomes. Methods We used data from the 2015-2019 Medical Monitoring Project, a yearly cross-sectional survey of PLHIV in the United States (N=15,964). We created a ten-item index of SDOH and assessed differences in HIV care outcomes of missed medical appointments, medication adherence, and durable viral suppression by SDOH using this index using prevalence ratios with predicted marginal means. Results Eighty-three percent of PLHIV reported at least one SDOH indicator. Compared to PLHIV who experienced none of the SDOH indicators, people who experienced one, two, three, and four or more SDOH indicators, were 1.6, 2.1, 2.6 and 3.6 as likely to miss a medical appointment in the prior year; 11%, 17%, 20% and 31% less likely to report excellent adherence in the prior 30 days; and, 2%, 4%, 10% and 20% less likely to achieve durable viral suppression in the prior year, respectively. Conclusions Among PLHIV, cumulative exposure to social and economic disadvantage impacts care outcomes in a dose-dependent fashion. A simple index may identify PLHIV experiencing barriers to HIV care, adherence, and durable viral suppression in need of critical supportive services.

Background Antiretroviral therapy effectively reduces the risk of human immunodeficiency virus transmission, but in the context of undetectable equals untransmittable and decreased condom use, rates of syphilis are increasing. In Oregon, syphilis has risen over 20-fold in the past decade, from less than 30 to approximately 600 cases annually during 2016 and 2017. Although many cases are among people living with human immunodeficiency virus infection (PLWH), screening for syphilis among PLWH is often lacking. The objective of this study was to estimate the prevalence of past-year syphilis testing among PLWH in Oregon to identify facility-level and individual-level factors associated with testing. Methods We examined 2015 to 2016 Medical Monitoring Project interview and medical records data in Oregon and conducted supplemental interviews with participants' medical providers. We used generalized mixed effects models to identify factors associated with syphilis screening. Results Sixty-nine percent of Medical Monitoring Project participants had past-year syphilis screening. Patients receiving care from facilities with written sexually transmitted infection screening policies were far more likely to be screened than those receiving care from facilities without written policies (94% vs. 43%, P < 0.001). Participants who identified as male were more likely to have been tested, even after adjusting for facility-level characteristics. Clustering within facility accounted for about 15% of the unexplained variability in the adjusted mixed effects models. Conclusions Written sexually transmitted infection screening policies at medical facilities appear to be an important tool for ensuring syphilis screening occurs as recommended to prevent the continued rise in syphilis.