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From a large series of patients with delusional psychoses, first-time admitted to the Psychiatric Department, University of Oslo, hypochondriacal delusions were coded as the main delusion in 15 patients (0.4% of all admissions). These patients have been personally followed up by one of the authors (N.R.) after 5-18 years, and by the other author (S.O.) after 23-39 years (mean 30 years). The results are presented, also according to the newer diagnostic systems (DSM-III, DSM-III-R), and the course and outcome of hypochondriacal delusions are compared with those of other types of delusions. Course and outcome are mainly dependent on the diagnostic category, not the type of delusion. It is also demonstrated that the course and outcome in major affective disorders are more favourable than in paranoid disorders, with the latter being significantly different from schizophrenia.
Opjordsmoen et al. (Tue,) studied this question.