GPs were asked to fill in a brief questionnaire for all patients (18–64 years of age) coming to their practice on a given preselected day or several days. Information on the patients’ demographics, health status, reasons for consulting the GP, current alcohol use and AUDs, and information regarding treatment for AUDs were determined by the GP, based on his/her best knowledge of the patients’ problems. GPs were allowed to use the patients’ medical charts. Trained study personnel interviewed the patients after their appointment at the GP’s premises or on a subsequent day at the study center. Informed consent was obtained by all interviewed patients.
