The authors are from the University of Washington and Veterans Affairs Puget Sound Health Care System in Seattle.
Patient selection: adult
Setting: legal cannabis use
Outcome: presence of cannabis-use disorder (CUD)
Single Item: how often marijuana used in past year
Responses: never, less than monthly, monthly, weekly, daily or almost daily
Positive screen: less than monthly, monthly, weekly, daily/almost daily
Negative screen: never
Prevalence of DSM-V CUD: 6.6%
Negative predictive value: 97-100%
Positive predictive value: 17-34%
Performance:
• The reported area under the ROC curve for CUD is 0.89.
