The surveys included comparable data on demographics (age, area of residence and education), HIV/sexually transmitted infection (STI) testing, and sexual behaviour in the previous 12 months [numbers of sexual, anal intercourse (AI) and unprotected anal intercourse (UAI) partners]. Number of sexual and AI partner variables were dichotomized (< 10 vs ≥ 10 partners). A measure of UAI with higher risk for HIV infection was derived to include men who reported UAI with at least two partners, casual partners and/or unknown/discordant partners in the previous 12 months (compared with men reporting UAI with fewer than two partners, regular partners or known/concordant partners only).