Delusion-like experiences in older people with anxiety disorders

Byrne, Gerard J., Steele, Sarah J. and Pachana, Nancy A. (2015) Delusion-like experiences in older people with anxiety disorders. International Psychogeriatrics, 27 7: 1191-1196. doi:10.1017/S1041610215000113


Author Byrne, Gerard J.
Steele, Sarah J.
Pachana, Nancy A.
Title Delusion-like experiences in older people with anxiety disorders
Journal name International Psychogeriatrics   Check publisher's open access policy
ISSN 1041-6102
1741-203X
Publication date 2015-03-05
Year available 2015
Sub-type Article (original research)
DOI 10.1017/S1041610215000113
Open Access Status Not yet assessed
Volume 27
Issue 7
Start page 1191
End page 1196
Total pages 6
Place of publication Cambridge, United Kingdom
Publisher Cambridge University Press
Language eng
Abstract Background: Little is known about the occurrence of psychotic or quasi-psychotic experiences in older people with anxiety disorders.
Formatted abstract
Background: Little is known about the occurrence of psychotic or quasi-psychotic experiences in older people with anxiety disorders.

Methods: We used a cross-sectional national probability sample of community-residing individuals to investigate the prevalence and correlates of delusion-like experiences in older people with DSM-IV anxiety disorders. The 2007 Australian National Survey of Mental Health and Well-being (NSMHWB) included 1,905 persons between the ages of 65 and 85 years. Anxiety disorder diagnoses were established using the Composite International Diagnostic Interview (CIDI v3). Participants were asked about three types of delusion-like experiences: thought control or interference, special meaning, and special powers. We used multivariate logistic regression to examine the relationship between a 12-month history of any anxiety disorder and the presence of these delusion-like experiences, adjusting for several potential confounders.

Results:
Eighty-two of 1,905 (4.3%) older people met criteria for an anxiety disorder over the previous 12 months. Of these, six reported delusion-like experiences, whereas the prevalence of these experiences among older people without anxiety disorder was 26/1,822 (7.3% vs. 1.4%; χ2 = 16.5; p = 0.000). In a logistic regression model, male gender (OR 0.38; p = 0.019), separated marital status (OR 4.86; p = 0.017), and the presence of anxiety disorder (OR 5.33; p = 0.001) were independently associated with delusion-like experiences, whereas MMSE (Mini-Mental State Examination) score, general medical conditions and affective disorder were not.

Conclusions:
In this cross-sectional study, self-reported delusion-like experiences occurred at increased prevalence among community-residing older persons with anxiety disorder. More work is needed to clarify the nature and significance of these findings.
Keyword Aged
Anxiety
Delusion
Prevalence
Psychosis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Medicine Publications
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