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Association between mid- to late life physical fitness and dementia: evidence from the CAIDE study
Stockholm University, Faculty of Social Sciences, Aging Research Center (ARC), (together with KI). University of Eastern Finland, Finland; Karolinska Institutet, Sweden.
Stockholm University, Faculty of Social Sciences, Aging Research Center (ARC), (together with KI). Jönköping University, Sweden.
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2014 (English)In: Journal of Internal Medicine, ISSN 0954-6820, E-ISSN 1365-2796, Vol. 276, no 3, 296-307 p.Article in journal (Refereed) Published
Abstract [en]

Objectives. This study investigated the association between perceived physical fitness at midlife, changes in perceived fitness during the three decades from mid-to late life and dementia risk. Design. Prospective cohort study. Setting. Cardiovascular risk factors, ageing and incidence of dementia (CAIDE) study. Subjects. Subjects were selected from four independent, random samples of population-based cardiovascular surveys and were first examined in 1972, 1977, 1982 or 1987, when they were on average 50 years old. The CAIDE target population included 3559 individuals. A random sample of 2000 individuals still alive in 1997 was drawn for re-examinations (performed in 1998 and 2005-2008) that consisted of cognitive assessments, with 1511 subjects participating in at least one re-examination. Dementia diagnoses were also confirmed from national registers for the entire target population. Main outcome measure. All-cause dementia. Results. Poor physical fitness at midlife was associated with increased dementia risk in the entire target population [hazard ratio (HR), 1.5; 95% confidence interval (CI), 1.1-2.0]. In participants, odds ratio (OR) was 2.0 (95% CI, 0.9-4.0). This association was significant in apolipoprotein E epsilon 4 allele (APO epsilon 4) noncarriers (OR, 4.3; 95% CI, 1.4-13.3), men (HR, 1.8; 95% CI, 1.1-3.0) and people with chronic conditions (HR, 2.9; 95% CI, 1.3-6.6). A decline in fitness after midlife was also associated with dementia (OR, 3.0; 95% CI, 1.7-5.1), which was significant amongst both men and women and more pronounced in APOE epsilon 4 carriers (OR, 4.4; 95% CI, 2.1-9.1). Conclusions. Perceived poor physical fitness reflects a combination of biological and lifestyle-related factors that can increase dementia risk. A simple question about perceived physical fitness may reveal at-risk individuals who could benefit from preventive interventions.

Place, publisher, year, edition, pages
2014. Vol. 276, no 3, 296-307 p.
Keyword [en]
ageing, dementia, preventive medicine, public health, risk factors
National Category
Clinical Medicine
Identifiers
URN: urn:nbn:se:su:diva-107419DOI: 10.1111/joim.12202ISI: 000340499100011OAI: oai:DiVA.org:su-107419DiVA: diva2:748651
Note

AuthorCount:9;

Available from: 2014-09-20 Created: 2014-09-15 Last updated: 2017-12-05Bibliographically approved

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