What proportion of Australians has met the diagnostic criteria for a cannabis mental health disorder at some time in their life?

Approximately 2% of the Australian population has met the diagnostic criteria for cannabis dependence and 4% has met the diagnostic criteria for cannabis abuse at some time in their life.

Source: Australian Bureau of Statistics (ABS). 2007 National Survey of Mental Health and Wellbeing (NCETA secondary analysis, 2014).

Abuse: A maladaptive pattern of substance use leading to clinically significant impairment or distress.

Dependence: A maladaptive pattern of use in which the use of drugs or alcohol takes on a much higher priority for a person than other behaviours that once had greater value. The central characteristic is the strong, sometimes overpowering, desire to take the substance despite significant substance-related problems.