“…These a priori variables are classically included in analyses exploring associations of participant-level characteristics and sexual risk behaviors [27–29]. Covariates captured demographic characteristics and behaviors in the past 6 months and were binary unless otherwise noted: age in years (continuous, mean-centered), married or cohabitating, non-Hispanic African American, annual household income ≤$18,000, self-rated quality of life (QOL) as measured using an abbreviated Medical Outcomes Study Scale (continuous, mean-centered; scores ranged from 0 to 100 with higher scores indicative of better QOL) [30], alcohol or illicit substance use (>7 drinks in the past week, any injection or non-injection use of crack, cocaine, heroin, marijuana, hallucinogens, club drugs, methamphetamines, or recreational prescription drug use in the last 6 months), exchange of sex for drugs, money or housing, and homeless (currently living in a rooming or halfway house, shelter, welfare hotel, or on the street).…”