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Four Components Describe Behavioral Symptoms in 1,120 Individuals with Late-Onset Alzheimer's Disease

Hollingworth, Paul, Hamshere, Marian Lindsay, Escott-Price, Valentina, Dowzell, Kimberley, Moore, Pamela J., Foy, Catherine, Archer, Nicola, Lynch, Aoibhinn, Lovestone, Simon, Brayne, Carol, Rubinsztein, David C., Lawlor, Brian, Gill, Mike, Owen, Michael John and Williams, Julie 2006. Four Components Describe Behavioral Symptoms in 1,120 Individuals with Late-Onset Alzheimer's Disease. Journal of the American Geriatrics Society 54 (9) , pp. 1348-1354. 10.1111/j.1532-5415.2006.00854.x

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Abstract

OBJECTIVES: To investigate behavioral components of Alzheimer's disease (AD) and to analyze behavioral components in relation to disease severity, apolipoprotein E genotype (APOE), sex, years of education, age at onset, and cognitive impairment. DESIGN: Cross-sectional study. SETTING: Data were collected from community-dwelling individuals and those residing in nursing homes. PARTICIPANTS: A total of 1,120 individuals meeting National Institute of Neurological and Communicative Disorders and Stroke/Alzheimer's Disease and Related Disorders Association criteria for late-onset probable AD. MEASUREMENTS: Behavioral symptoms were assessed using the Neuropsychiatric Inventory. First-order polychoric correlations, controlling for disease severity, between the 12 symptom domain scores were estimated, and the resulting matrix underwent principal components analysis. RESULTS: Four interpretable components were identified: behavioral dyscontrol (euphoria, disinhibition, aberrant motor behavior, and sleep and appetite disturbances), psychosis (delusions and hallucinations), mood (depression, anxiety, and apathy), and agitation (aggression and irritability). Scores on the four components were associated with severity of cognitive impairment. Higher behavioral dysfunction, agitation, and mood component scores were associated with lower age at onset. Behavioral dysfunction and mood component scores were associated with sex. None of the components were associated with age at assessment, years of education, or number of APOE epsilon4 alleles. CONCLUSION: Four behavioral components were identified that were comparable with those observed previously. Future analysis of these components will strengthen understanding of the underlying pathology of behavioral symptoms and AD.

Item Type: Article
Date Type: Publication
Status: Published
Schools: MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Medicine
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: R Medicine > R Medicine (General)
Publisher: Wiley
ISSN: 0002-8614
Last Modified: 25 Dec 2017 20:25
URI: http://orca.cf.ac.uk/id/eprint/82040

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