[Psychophysiology as a predictor for treatment outcome: a pilot-study].

To test the possibility of predicting psychotherapy outcome by measures of cardiovascular adaptability to stress at the beginning of treatment we used a prospective, within-subject design with experimental induction of short-term stress. Cardiovascular data during induced stress (mental arithmetic, anger recall) and relaxation were assessed in 21 patients with a main diagnosis of depression at the beginning of their 12-week inpatient psychotherapy treatment. Lower change scores in blood pressure during induced stress at the beginning of therapy were significantly related to better treatment outcome, accounting for 41% of variance, even after controlling for several covariates. Furthermore, there was evidence for the impact of negative affect. Using cardiovascular stress testing as an additional area of information seems a feasible method of incorporating biological parameters in psychotherapy evaluation.