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Persistence and stability of delusions over time
Paul S Appelbaum1, Pamela Clark Robbins, Roumen Vesselinov
1Department of Psychiatry, University of Massachusetts Medical School, Worster 01655, USA.
Comprehensive Psychiatry
|August 28, 2004
Summary
Delusions show surprising fluidity, with many patients no longer experiencing delusional beliefs after just 10 weeks. This challenges traditional views on the fixed nature of delusions in psychiatric conditions.
Area of Science:
- Psychiatry
- Clinical Psychology
Background:
- Traditional psychiatric descriptions characterize delusions as fixed and resistant to change.
- Contemporary formulations also emphasize the stability of delusional beliefs.
Purpose of the Study:
- To assess the persistence and stability of delusional beliefs in acutely hospitalized psychiatric patients.
- To identify predictors of change in delusional beliefs over time.
Main Methods:
- Longitudinal study of 1,136 acutely hospitalized psychiatric patients.
- Reinterviews conducted at 10-week intervals for 1 year.
- Analysis of persistence (n=405) and stability (n=262) of delusional beliefs.
Main Results:
- Significant plasticity observed: one-third of delusional subjects were no longer delusional after 10 weeks.
- Delusion persistence associated with schizophrenia, global psychopathology, and acting on delusions.
- Most subjects exhibited changes in the content of their primary delusion over time.
Conclusions:
- Delusional beliefs demonstrate greater fluidity over short periods than previously suggested.
- Findings challenge established notions of delusion stability in psychiatric disorders.
- Further research is warranted to explore the mechanisms underlying delusion plasticity.