Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

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.

Original publication

DOI

10.1111/j.1532-5415.2006.00854.x

Type

Journal article

Journal

J Am Geriatr Soc

Publication Date

09/2006

Volume

54

Pages

1348 - 1354

Keywords

Age of Onset, Aged, Aged, 80 and over, Alzheimer Disease, Apolipoproteins E, Behavioral Symptoms, Cognition Disorders, Cross-Sectional Studies, Educational Status, Female, Genotype, Humans, Male, Middle Aged, Neuropsychological Tests, Severity of Illness Index, Sex Factors