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Delusional disorders. I. Comparative long-term outcome.

S Opjordsmoen1

  • 1University of Oslo, Gaustad Hospital, Norway.

Acta Psychiatrica Scandinavica
|December 1, 1989
PubMed
Summary
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This long-term study tracked delusional psychosis patients, finding that major affective disorder patients generally had better outcomes than schizophrenia patients. However, all diagnostic groups showed varied courses and results.

Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Longitudinal Studies

Background:

  • Delusional psychoses encompass a range of serious mental health conditions.
  • Understanding the long-term prognosis of different delusional disorders is crucial for effective treatment planning.
  • Previous research has indicated varied outcomes, but long-term, multi-decade follow-up data is limited.

Purpose of the Study:

  • To investigate the long-term course and functional outcomes of first-admitted patients with various delusional psychoses.
  • To compare the prognoses of schizophrenia, paranoid disorder, schizophreniform disorder, schizoaffective disorder, and major affective disorder over several decades.
  • To identify factors influencing long-term functioning and symptom persistence in these patient groups.

Main Methods:

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  • A cohort of 301 first-admitted patients diagnosed with delusional psychoses was initially assessed.
  • Patients were re-interviewed by the original researcher between 5-18 years post-admission.
  • A subsequent follow-up interview was conducted by the author 22-39 years (mean 30 years) after initial admission.

Main Results:

  • At long-term follow-up, 42% showed good functioning, while 58% experienced moderate to very severe symptoms or defects.
  • Forty percent of the cohort remained delusional at the final follow-up.
  • Schizophrenia patients generally had the poorest outcomes, while major affective disorder patients exhibited superior outcomes. Paranoid disorder, schizophreniform disorder, and schizoaffective disorder patients showed intermediate prognoses.

Conclusions:

  • Long-term outcomes for delusional psychoses are highly variable across diagnostic categories.
  • Major affective disorder appears to confer a better prognosis compared to schizophrenia in this cohort.
  • Despite diagnostic classifications, significant heterogeneity in course and outcome exists within each group, highlighting the complexity of these disorders.