One third of cannabis users exhibit cannabis use disorder

The study also shows that 14% of people who used cannabis up to five times in any one year (12-month cannabis users) also had a cannabis use disorder, broadly defined as when cannabis use has a significant impact on a person’s life.

Researchers analysed figures taken from the 2007 National Survey of Mental Health and Wellbeing (NSMHWB), which assessed symptoms of the most prevalent DSM-IV mental disorders in nearly 9000 Australians.

The prevalence of lifetime and 12-month cannabis use disorder (CUD) was 6% and 1% respectively, on a par with rates in the US.

The disorder was more prevalent in males and