Primary unipolar depression and the prognostic importance of delusions.

A consecutive series of inpatients with primary unipolar depression was categorized by the presence or absence of delusions as noted in the charts. The systematically obtained follow-up material contained in these charts showed that delusional patients had a relatively poor short-term outcome regardless of whether they received somatic treatment. Recovery rate increased with longer follow-up periods in both groups. In accord with this, a 40-year follow-up revealed no differences between delusional and nondelusional groups in terms of marital, residential, or occupational status, psychiatric symptoms, a final diagnosis of bipolar disorder, or death by suicide.