Coryell W, Tsuang M T, McDaniel J
J Affect Disord. 1982 Sep;4(3):227-36. doi: 10.1016/0165-0327(82)90007-6.
We studied outcome and family history in 203 patients with psychotic depression. Patients whose psychotic features were mood-incongruent were significantly younger and had a slightly poorer outcome. Morbid risks for affective disorder and schizophrenia among relatives distinguished these mood-incongruent patients from patients with non-psychotic depression but not from patients with schizophrenia. In contrast, depressive probands with mood-congruent psychotic features resembled probands with non-psychotic depression and differed significantly from schizophrenia probands in terms of family history. While depressed patients with mood-congruent psychotic features experienced poorer short-term outcome relative to non-psychotic depressed patients, a 40-year follow-up has shown that these differences disappear over time. Moreover, these two groups are quite similar according to family history data. Both family history and short-term outcome data suggest that major depression with mood-incongruent psychotic features cannot be classified altogether with either affective disorders or schizophrenia. More definite conclusions must await the results of long-term outcome and family studies of these patients presently underway.
