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Detecting delirium in elderly outpatients with cognitive impairment

Published online by Cambridge University Press:  15 April 2016

Anne J. M. Stroomer-van Wijk ,
Barbara W. Jonker ,
Rob M. Kok ,
Roos C. van der Mast  and
Hendrika J. Luijendijk
Anne J. M. Stroomer-van Wijk
Affiliation:
Department of Old Age Psychiatry, Parnassia, The Hague, the Netherlands
Barbara W. Jonker
Affiliation:
Department of Old Age Psychiatry, Parnassia, The Hague, the Netherlands
Rob M. Kok
Affiliation:
Department of Old Age Psychiatry, Parnassia, The Hague, the Netherlands
Roos C. van der Mast
Affiliation:
Department of Psychiatry, Leiden University Medical Center, Leiden, the Netherlands
Hendrika J. Luijendijk*
Affiliation:
Department of General Practice, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands Department of Geriatric Psychiatry, BAVO Europoort, Rotterdam, the Netherlands
*
Correspondence should be addressed to: H.J. Luijendijk, University of Groningen, University Medical Centre Groningen, Department of General Practice, Postbus 196, 9700 AD Groningen, the Netherlands. Phone: +31-50-363-2731; Fax: +31-50-363-2964. Email: h.j.luijendijk@umcg.nl.
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Abstract

Background:

Delirium may be more prevalent in elderly outpatients than has long been assumed. However, it may be easily missed due to overlap with dementia. Our aim was to study delirium symptoms and underlying somatic disorders in psycho-geriatric outpatients.

Methods:

We performed a case-control study among outpatients that were referred to a psychiatric institution between January 1st and July 1st 2010 for cognitive evaluation. We compared 44 cases with DSM-IV delirium (24 with and 20 without dementia) to 44 controls with dementia only. All participants were aged 70 years or older. We extracted from the medical files (1) referral characteristics including demographics, medical history, medication use, and referral reasons, (2) delirium symptoms, scored with the Delirium Rating Scale-Revised-98, and (3) underlying disorders categorized as: drugs/intoxication, infection, metabolic/endocrine disturbances, cardiovascular disorders, central nervous system disorders, and other health problems.

Results:

At referral, delirium patients had significantly higher numbers of chronic diseases and medications, and more often a history of delirium and a recent hospital admission than controls. Most study participants, including those with delirium, were referred for evaluation of (suspected) dementia. The symptoms that occurred more frequently in cases were: sleep disturbances, perceptual abnormalities, delusions, affect lability, agitation, attention deficits, acute onset, and fluctuations. Drug related (68%), infectious (61%), and metabolic-endocrine (50%) disturbances were often involved.

Conclusions:

Detection of delirium and distinction from dementia in older outpatients was feasible but required detailed caregiver information about the presence, onset, and course of symptoms. Most underlying disorders could be managed at home.

Keywords

deliriumoutpatientsclinical presentationdementiaold age
Type
Research Article
Information
International Psychogeriatrics , Volume 28 , Issue 8 , August 2016 , pp. 1303 - 1311
Copyright
Copyright © International Psychogeriatric Association 2016 

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