Self-report measures as predictors of psychotherapy outcome

A retrospective clinical study using existing patient records investigated the predictive value of a number of variables. Eighty-three new admissions to a large outpatient clinic completed a battery of eight self-report questionnaires that have been shown to be reliable and have a measure of discriminant validity. The battery consisted of items tapping anxiety, depression, obsessive-compulsive symptoms, phobias, borderline personality disorder, and histrionic, obsessive-compulsive, and paranoid personality styles. Outcome of therapy, which was predominantly dynamically-oriented, was assessed by residual difference scores computed from pre- and posttherapy Global Assessment Scale (GAS) ratings. Only patients attending five or more sessions (N = 37) were considered in the analyses. Patients high on the Anxiety Scale pretherapy showed relatively greater improvement in functioning than those with low initial scores. Patients scoring high on the Histrionic, Paranoid, and Obsessive-Compulsive Personality Scales showed the least relative improvement.