Acceptance, Attrition, and Outcome in an Outpatient Treatment Programme for Alcoholics : a Comparison Between a Randomized and a Non-Randomized Process-Outcome Study

Acceptance, attrition and outcome of the same outpatient treatment programme for alcoholics was studied first in a non-randomized and later in a randomized study. There was a lower (15%) rate of acceptance and a higher (19%) rate of attrition in the randomized study. Among treatment completers drinking outcome during the third year after commencement of treatment did not differ between the non-randomized and the randomized study. It is concluded that the characteristics of subjects accepting a randomly assigned study should always be clearly presented. The absence of a patient-therapist matching in a randomized design could negatively effect attrition and probably also acceptance of treatment, while it seems to be less influential on outcome in those completing therapy