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Abstract
Diverse approaches to treatment research in Norway have hampered comparative studies. The European Addiction Severity Index (EuropASI) was chosen as the main instrument in the first comprehensive study of drug abusers undergoing treatment. The study comprises 482 drug abusers in 20 different treatment programmes who were interviewed at intake to inpatient modalities, substitution programmes and outpatient clinics. They were interviewed twice again at 1‐year intervals with a follow‐up rate of 90%. The clients' response to the EuropASI was positive, and it has been found to be beneficial as an instrument for clinical use and for research purposes. This paper focuses on the broad interest in the EuropASI in the Norwegian drug and alcohol treatment field and recommends some changes that would improve its construct validity and bolster its reliability.
