Use of pre-exposure prophylaxis increases the odds of condomless anal sex among young men who have sex with men (MSM) of colour.

This study tested the hypothesis that people using pre-exposure prophylaxis (PrEP) would be more likely to report condomless anal sex than those not taking PrEP. Data were from an ongoing study conducted with a cohort of Black and Latino young men who have sex with men (YMSM) recruited in Los Angeles (CA, USA). Of the 399 YMSM in the sample, 14% were currently using PrEP. Using three different measures of condom use, across two different recall periods all except one test result supported an inverse relationship between PrEP and condom use for anal sex. Tests of a risk index provided further significant findings supporting this hypothesis.