Of the entire sample, 68.9% (N=2276) reported lifetime cannabis use with a significantly higher prevalence for males (76.5%) than females (64.9%) (OR = 1.76, 95% confidence interval [CI] 1.50–2.07). This prevalence is comparable to the prevalence obtained from a large household survey in Australia, which showed that 55% of Australians aged between 20 and 39 years have used cannabis during their lives (McLaren & Mattick, 2007). The slightly higher estimate obtained in our sample may be the result of the somewhat younger age group.
