Personality assessments of 119 treatment-responsive patients with
recurrent unipolar depression revealed that nearly half of the patients
(48%) showed some personality disturbance. The most common personality
features were avoidant (30.4%), compulsive (18.6%), and dependent (15.7%).
Factor analyses of personality data in this homogeneous population yielded
results that were consistent with previous factor analytic studies of
personality features and clinical descriptions of depressed patients. Most
notably, a discriminant function analysis using personality variables alone
was able to distinguish (with 65% accuracy) between patients who responded
normally to treatment and those who responded more slowly.