Response to cognitive therapy in depression: the role of maladaptive beliefs and personality disorders.
Kuyken W., Kurzer N., DeRubeis RJ., Beck AT., Brown GK.
This study examined whether personality disorder status and beliefs that characterize personality disorders affect response to cognitive therapy. In a naturalistic study, 162 depressed outpatients with and without a personality disorder were followed over the course of cognitive therapy. As would be hypothesized by cognitive theory (A. T. Beck & A. Freeman, 1990), it was not personality disorder status but rather maladaptive avoidant and paranoid beliefs that predicted variance in outcome. However, pre- to posttherapy comparisons suggested that although patients with or without comorbidity respond comparably to "real-world" cognitive therapy, they report more severe depressive symptomatology at intake and more residual symptoms at termination.