Substance Use and Sexual Risk Behavior Among Black Men Who Have Sex With Men in New York City: Evidence for Increased Risk During Young Adulthood.

This study evaluated whether the association between substance use and sexual risk behavior varies as a function of age among 1,009 Black men who have sex with men (BMSM) in New York City. Hierarchical linear regression was used to examine the relationship between age (18-26 vs. 27+), substance use, and number of sexual partners and acts of condomless anal sex (CAS) in the past 90 days. Age moderated the relationship between substance use and sexual risk behavior, such that positive associations among binge drinking, marijuana, cocaine, and party drug use and number of male sexual partners and cocaine use and acts of CAS were significantly stronger among young adults than adults. BMSM may engage in more sexual risk behavior during young adulthood, and those who use substances may be at increased risk for HIV transmission-particularly through multiple sex partners. HIV prevention interventions targeting BMSM may benefit from being tailored to age and addressing sexual risk behavior and substance use concurrently.