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Markers for depression in Alzheimer's disease

Published online by Cambridge University Press:  24 June 2014

Ruud van Winkel
Affiliation:
Department of Psychiatry, Maastricht University Hospital, Maastricht, The Netherlands University Centre St. Jozef, Kortenberg, Belgium
Albert F. G. Leentjens*
Affiliation:
Department of Psychiatry, Maastricht University Hospital, Maastricht, The Netherlands Institute of Brain and Behaviour, Maastricht University, Maastricht, The Netherlands
Frans R. J. Verhey
Affiliation:
Department of Psychiatry, Maastricht University Hospital, Maastricht, The Netherlands Institute of Brain and Behaviour, Maastricht University, Maastricht, The Netherlands
*
Dr Albert F. G. Leentjens, Department of Psychiatry, Maastricht University Hospital, PO Box 5800, 6202 AZ Maastricht, The Netherlands. Tel: +31 43 3877443; Fax: +31 43 3875444; E-mail: [email protected]

Abstract

Objective:

The aim of this study was to evaluate whether risk factors for depression in the general population are also markers for depression in Alzheimer's disease (AD) and to identify additional disease-specific markers for depression in AD.

Patients and methods:

A logistic model of five risk factors for depression in the general population was constructed using the data of 217 patients with AD, of whom 63 (29%) suffered from major depressive disorder. In a next step, five potential disease-specific markers were individually added to this model to see whether the strength and predictive power of the model would improve.

Results:

The multivariate model of five risk factors for depression in the general population was not a good model to predict depression in AD. In this multivariate approach, only ‘a history of depression’ was an independent marker for depression. The only disease-specific variable that improved the logistic model was ‘disability due to AD’. An interaction between these two markers became apparent.

Conclusions:

Of the established risk factors for depression in the general population, only ‘a history of depression’ was found to be an independent marker for depression in AD. ‘Disability due to AD’ was the only disease-related marker for depression in AD, although this marker cannot be considered specific for AD. The importance of controlling for general risk factors for depression in the search for disease-specific markers for depression in AD is stressed.

Type
Research Article
Copyright
Copyright © 2006 Blackwell Munksgaard

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