Journal
ARCHIVES OF GENERAL PSYCHIATRY
Volume 69, Issue 6, Pages 636-642Publisher
AMER MEDICAL ASSOC
DOI: 10.1001/archgenpsychiatry.2011.1858
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Funding
- ZonMw (a Dutch nonprofit research organization) [92003563, 62000015]
- Alzheimer's Association [NIRG-10-173212]
- Dutch Ministry of Health, Welfare, and Sports [50-50110-98-020]
- Innovatie-fonds Zorgverzekeraars (innovation fund of collaborative health insurances) [05-234]
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Context: Apathy in community-dwelling elderly individuals has been associated with a history of stroke and other cardiovascular disease. Objective: To assess the relationship between symptoms of apathy and cardiovascular risk factors or disease (stroke or other) in a large sample of elderly people aged 70 to 78 years without depression or dementia. Design: Cross-sectional data analysis within an ongoing cluster-randomized, open, multicenter trial. Setting: The Netherlands, general community. Participants: We studied 3534 elderly individuals without dementia who were included in the Prevention of Dementia by Intensive Vascular Care trial. Main Outcome Measures: Symptoms of apathy, assessed with 3 items from the 15-item Geriatric Depression Scale, in participants with few or no depressive symptoms. Results: The median age of participants was 74.3 years. Principal components analysis of the Geriatric Depression Scale confirmed a separate factor for the apathy items (Geriatric Depression Scale-3A). Two or more symptoms of apathy were present in 699 participants (19.9%), of whom 372 (53.2%) were without depressive symptoms (Geriatric Depression Scale-12D score <2). Ordinal regression analysis showed that increasing apathy in the absence of depressive symptoms was associated with a history of stroke (odds ratio, 1.79; 95% CI, 1.38-2.31) and cardiovascular disease other than stroke (1.28; 1.09-1.52). Exploratory analysis among 1889 participants free from stroke and other cardiovascular disease revealed an association between apathy score and the following cardiovascular risk factors: systolic blood pressure (P=.03), body mass index (P=.002), type 2 diabetes mellitus (P=.07), and C-reactive protein (P < .001). Conclusions: Symptoms indicative of apathy are common in community-dwelling nondemented older people who are free from depression. The independent association of stroke, other cardiovascular disease, and cardiovascular risk factors with symptoms of apathy suggests a causal role of vascular factors.
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