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Multiple personality disorder in Switzerland.

J Modestin1

  • 1Psychiatric University Clinic, Bern, Switzerland.

The American Journal of Psychiatry
|January 1, 1992
PubMed
Summary
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Multiple personality disorder, now known as dissociative identity disorder, is rare but does exist. This study surveyed Swiss psychiatrists to understand its prevalence in Switzerland.

Area of Science:

  • Psychiatry
  • Mental Health Research

Background:

  • Reliable data on the prevalence of multiple personality disorder (MPD) is lacking.
  • Understanding the frequency of MPD diagnosis is crucial for clinical practice and research.

Purpose of the Study:

  • To determine the prevalence and frequency of encountering and diagnosing multiple personality disorder (MPD) in Switzerland.
  • To gather data on how often Swiss psychiatrists encounter patients with MPD.

Main Methods:

  • A questionnaire survey was distributed to qualified Swiss psychiatrists, including DSM-III criteria and case examples.
  • 836 psychiatrists responded (66% response rate), with 770 questionnaires evaluated.
  • Non-responders were contacted via telephone to supplement data.

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Main Results:

  • 3% of psychiatrists reported treating or examining MPD patients at the time of the survey.
  • 10% of psychiatrists had encountered at least one MPD case in their career.
  • The point prevalence of MPD among psychiatric patients in Switzerland was estimated at 0.05%-0.1%.

Conclusions:

  • Multiple personality disorder (MPD) is a genuine psychiatric condition.
  • Despite its existence, MPD occurs relatively infrequently in the Swiss psychiatric population.