Data collection and analysis
REGRESSION
Baseline demographics and clinical data were collected via interviewer-administered case report forms (CRFs) at both the screening and enrollment visits, while baseline behavioral data were self-reported by participants via audio computer-assisted self-interviewing (ACASI) at enrollment. Medians were used to summarize the mental health scales. We explored significant associations (p < 0.05) between demographic and behavioral characteristics and participants’ baseline product preferences for oral PrEP, the ring, or both products equally using multinomial logistic regression models, with “preference for oral PrEP” as the reference group. The model for site was adjusted for age (16–17-year-olds vs 18–21-year-olds), conversely, the model for age was adjusted for site, and all other models were adjusted for age and site. Analyses were carried out in SAS Version 9.4 (SAS Institute, Cary, NC, USA).