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Epidemiology. 2005 Mar;16(2):233-8.

Depression and the risk of Alzheimer disease.

Author information

1
Department of Psychiatry, Odense University Hospital, DK-5000 Odense C, Denmark. kjeld.andersen@dadlnet.dk

Abstract

BACKGROUND:

Several epidemiologic studies have examined depression as a risk factor for Alzheimer disease with conflicting results. Most studies relied on self-reported depression, but the agreement between self-reported depression and clinical diagnosis has been reported to be weak, thereby diluting the association.

METHODS:

A population-based cohort in Odense, Denmark, of 3346 persons age 65-84 years was examined at baseline (1992-1994) and after 2 years (1994-1996) and 5 years (1997-1999). History of depression was collected at baseline as self-report. We used logistic regression models to estimate odds ratios (ORs) and 95% confidence intervals (CIs).

RESULTS:

Persons with a history of depression had an increased risk of Alzheimer disease both at baseline (OR = 1.7; CI = 1.0-2.7) and at follow up (at 2 years, 1.9 [1.0-3.3] and at 5 years, 1.6 [0.9-2.7]).

CONCLUSIONS:

Depression was associated with an increased risk of Alzheimer disease. The odds ratios were lower than generally reported from follow-up studies and are similar to cross-sectional studies.

Republished in

[Indexed for MEDLINE]

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