Clinical and demographic features of psychotic and nonpsychotic depression.

The present study evaluated clinical and demographic features of subjects with delusional versus nondelusional major depressive disorder. Two hundred eighty-eight subjects with mood disorder (bipolar disorder, n = 94; major depressive disorder, n = 194) were included in the study. No differences were observed for gender, polarity of mood disorder, age of onset, duration of index episode, number of episodes, number of previous hospital admissions, frequency of illness episodes, and number of suicide attempts. On the other hand, delusional subjects showed a higher rate of cluster A personality disorder and a lower level of education. We also detected a larger number of cluster B personality disorders among nondelusionals. Our data suggest that subjects with delusional mood disorder do not differ substantially from nondelusionals in terms of the clinical and demographic variables considered in this study except for personality disorders.