Fig 1. Item-response probabilities across classes of MSM in Tijuana, Mexico with varying patterns of perceived barriers to PrEP use as identified by Latent Class Analysis (N = 364).

Identified classes consist of MSM with high-levels of perceived barriers (circle; 12.0%), low-levels of perceived barriers (square; 43.0%), and those who perceived PrEP attribute barriers (triangle; 45.0%). Abbreviations: CAI = condomless anal intercourse; HCP = healthcare provider; MSM = men who have sex with men; PrEP = pre-exposure prophylaxis.