Sociodemographic and Behavioral Characteristics of Study Participants Two Months before (n = 398) versus One Month after (n = 4 558) Publication of Oral Pre-Exposure Prophylaxis Efficacy Results (the iPrEx Study).

UAI = unprotected anal intercourse; STI = sexually transmitted infection; PCP = primary care provider; CES-D = Center for Epidemiologic Studies Depression Scale; CAGE = 4-question screen for alcohol abuse.1Total number of participants responding to each question.2Self-perceived risk of HIV acquisition = scale from 1 (no risk) to 10 (extreme risk).3Interested in using PrEP = likely or extremely likely to use PrEP.4Excludes 15/2977 (0.5%) participants who self-identified as heterosexual post-iPrEx.5Among participants indicating UAI in the prior 3 months.