Table 1.

Substance Use Disorder History

	Prescan	Postscan
1	One year of cannabis abuse ended 3 years prior to scan	Cannabis abuse
2	No substance use disorder	Alcohol dependence Cannabis abuse Cannabis dependence
3	No substance use disorder	Cannabis abuse
4	Two years of cannabis abuse ended 1 month prior to scan	Cannabis abuse
5	No substance use disorder	Cannabis abuse
6	No substance use disorder	Cannabis abuse
7	Less than 1 year of cannabis abuse/dependence ended 3 months prior to scan; four months of heroin dependence ended 3 months prior to scan	Cannabis abuse