The natural history of delirium in older hospitalized patients: a syndrome of heterogeneity.

Abstract:

OBJECTIVES:To determine the presentation, course and duration of delirium in hospitalized older people. DESIGN:Observational cohort study. SETTING:Inpatient surgical and medical wards at a university hospital. PARTICIPANTS:432 people over the age of 65. MEASUREMENTS:All participants were screened daily for confusion and, in those who were confused, delirium was ascertained using the Diagnostic and Statistical Manual of Mental Disorders (DSM) III-R criteria. Those who were found to be delirious were followed daily while in hospital for evidence of delirium. The Delirium Rating Scale (DRS) was used to describe the clinical characteristics of delirium. RESULTS:About 15% of subjects had delirium. Sixty-nine percent of delirious subjects had delirium on a single day. The DRS total was higher on the first day of delirium for those with delirium on multiple days than those with delirium on a single day (P = 0.03). Among those with delirium on multiple days, there were no patterns of change over time in specific DRS items. CONCLUSIONS:Delirium in hospitalized older people is common and has a varied presentation and time course. Clinicians and researchers need to consider this great heterogeneity when caring for patients and when studying delirium.

journal_name

Age Ageing

journal_title

Age and ageing

authors

Rudberg MA,Pompei P,Foreman MD,Ross RE,Cassel CK

doi

10.1093/ageing/26.3.169

subject

Has Abstract

pub_date

1997-05-01 00:00:00

pages

169-74

issue

3

eissn

0002-0729

issn

1468-2834

journal_volume

26

pub_type

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