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A Multiple Indicators Multiple Causes (MIMIC) model of Behavioural and Psychological Symptoms in Dementia (BPSD)

Proitsi, P., Hamilton, G., Tsolaki, M., Lupton, M., Daniilidou, M., Hollingworth, Paul, Archer, N., Foy, C., Stylios, F., McGuinness, B., Todd, S., Lawlor, B., Gill, M., Brayne, C., Rubinsztein, D.C., Owen, Michael John, Williams, John David, Craig, D., Passmore, P., Lovestone, S. and Powell, J. F. 2011. A Multiple Indicators Multiple Causes (MIMIC) model of Behavioural and Psychological Symptoms in Dementia (BPSD). Neurobiology of Aging 32 (3) , pp. 434-442. 10.1016/j.neurobiolaging.2009.03.005

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Introduction Although there is evidence for distinct behavioural sub-phenotypes in Alzheimer's disease (AD), their inter-relationships and the effect of clinical variables on their expression have been little investigated. Methods We have analysed a sample of 1850 probable AD patients from the UK and Greece with 10 item Neuropsychiatric Inventory (NPI) data. We applied aMultipleIndicatorsMultipleCauses (MIMIC) approach to investigate the effect of MMSE, disease duration, gender, age and age of onset on the structure of a four-factor model consisting of “psychosis”, “moods”, “agitation” and “behavioural dyscontrol”. Results Specific clinical variables predicted the expression of individual factors. When the inter-relationship of factors is modelled, some previously significant associations are lost. For example, lower MMSE scores predict psychosis, agitation and behavioural dyscontrol factors, but psychosis and mood predict the agitation factor. Taking these associations into account MMSE scores did not predict agitation. Conclusions The complexity of the inter-relations between symptoms, factors and clinical variables is efficiently captured by this MIMICmodel.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords: Alzheimer's disease (AD); BPSD; Behavioural sub-phenotypes; Structural Equation Modelling (SEM); Confirmatory Factor Analysis (CFA); MultipleIndicatorsMultipleCauses (MIMIC) model; Factors; Latent variables; Differential Item Functioning (DIF); Neuropsychiatric Inventory (NPI); Covariates; MMSE; Disease duration; Age; Age of onset
Publisher: Elsevier
ISSN: 0197-4580
Last Modified: 30 Jun 2017 02:20

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