Methamphetamine use among gay and bisexual men in Australia: Trends in recent and regular use from the Gay Community Periodic Surveys

BACKGROUND: Gay and bisexual men typically report high rates of illicit drug use, including methamphetamine use. This paper aimed to analyse trends in crystal methamphetamine ('crystal') and powder methamphetamine ('speed') use among gay and bisexual men in Australia, and characterise the sociodemographic, drug use, and sexual risk practices of men who reported crystal use. METHODS: The Gay Community Periodic Surveys, routinely conducted behavioural surveillance surveys of gay men in Australia, were analysed to examine trends in recent crystal and speed use during 2005-14 (any use in the previous 6 months), and trends in regular crystal and speed use during 2007-14 (at least monthly use in the previous 6 months). Covariates of recent and regular crystal use were analysed using 2014 data. RESULTS: Speed use declined from 25.0% to 10.2% during 2005-14 (p-trend