Socio-economic differentials in cannabis use trends in Australia

To test if the degree of change in cannabis use between 2001 and 2013 differed according to socio-economic status.Repeated cross-sectional household surveys that were nationally representative.Australia.Adult samples from the 2001 and 2013 National Drug Strategy Household Surveys (n\ua0=\ua023 642 in 2001 and n\ua0=\ua021 353 in 2013), the largest nationally representative survey on drug use in Australia.Frequency of cannabis use coded as daily use, weekly use, less than weekly use and non-current use; socio-economic status (SES) as measured by personal income and educational level.There were significant differences in changes to levels of cannabis use between SES groups. Among participants who completed high school, the probability of daily use decreased from 0.014 to 0.009 (P\ua