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Leisure activities in late life in relation to dementia risk: principal component analysis
Aging Research Center (ARC), Department of Neurobiology, Care Sciences and Society, Karolinska Institutet.ORCID iD: 0000-0002-1968-2326
Aging Research Center (ARC), Department of Neurobiology, Care Sciences and Society, Karolinska Institutet.
Aging Research Center (ARC), Department of Neurobiology, Care Sciences and Society, Karolinska Institutet.
Aging Research Center (ARC), Department of Neurobiology, Care Sciences and Society, Karolinska Institutet.
2009 (English)In: Dementia and Geriatric Cognitive Disorders, ISSN 1420-8008, E-ISSN 1421-9824, ISSN 1420-8008, Vol. 28, no 2, 136-144 p.Article in journal (Refereed) Published
Abstract [en]

AIMS: To explore the underlying dimensions of a set of interrelated lifestyle factors and test the hypothesis that an active lifestyle may protect against dementia. METHODS: The study population consisted of 776 participants aged >or=75 years who were dementia-free at both baseline and the first follow-up examinations. Participation in leisure activities was assessed at baseline of the survey, and principal component analysis was used to identify their underlying factors. RESULTS: During the 9-year follow-up from exposure assessment, 212 subjects developed dementia. Higher factor scores of physical, mental, and social dimensions of an active lifestyle was each related to a lower dementia risk. A significant dose-response association between participation in the diverse dimensions and lower dementia risk was observed. CONCLUSION: An active lifestyle may protect older people against dementia, and the higher level of engagement the stronger protection.

Place, publisher, year, edition, pages
2009. Vol. 28, no 2, 136-144 p.
Keyword [en]
dementia, life style, leisure activities
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:rkh:diva-371DOI: 10.1159/000235576PubMedID: 19690416OAI: oai:DiVA.org:rkh-371DiVA: diva2:556764
Available from: 2012-09-26 Created: 2012-09-26 Last updated: 2015-01-28Bibliographically approved
In thesis
1. Leisure activities at old age and their influence on dementia development
Open this publication in new window or tab >>Leisure activities at old age and their influence on dementia development
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis aims to describe the participation in leisure activities of elderly subjects and to detect their possible effect, if any, on the development of dementia. The data were derived from the Kungsholmen Project, which is a community-based prospective study on aging and dementia in people aged over 74 years, living in Stockholm, Sweden. The major findings are summarized below. Study I. The pattern of participation in leisure activities was related to contextual factors as well as to mental and physical health conditions. In spite of the advanced age, the majority of the population was active, as 70% participated in at least one activity. Reading (19%) was the most prevalent individual activity, and mental activities (43%) the most prevalent activity type. Older age, female gender, low education, poor or limited social network, mental disorders, and physical limitation were all correlated with a decreased engagement in at least one activity . Contextual factors and health-related factors were differentially associated with the five activity types. Study II. We aimed to verify the hypothesis that mental, social and physical components are relevant protective factors against dementia, and that a combined beneficial effect may be present over a 6-year follow-up period. Multi-adjusted relative risks (RRs) of dementia for subjects with higher mental, physical and social component scores were 0.71 (95% CI: 0.49 1.03), 0.61 (95% CI: 0.42 0.87) and 0.68 (95% CI: 0.47 0.99), respectively. The most beneficial effect was present for subjects with high scores in all or in two of the components (RR of dementia=0.53; 95% CI: 0.36 0.78). Study III. The hypothesis that an active lifestyle may protect against dementia development was further tested by using principal component analysis to characterize the exposure. Among a set of lifestyle variables, three underlying factors were identified: physical, mental and social factors. All the factors showed an independent protective effect on dementia development. The relative risks (RRs) ranged from 0.60 to 0.70. When these factors were integrated into an Active Lifestyle Index, a significant dose-response association was observed, Compared with low level of engagement (low in at least two of the factors), the RR of dementia was 0.66 (95% CI: 0.49-0.89) for the moderate level (high scores in two factors), and RR=0.51 (95% CI: 0.31-0.85) for the high level (high scores in all three factors). Study IV. The hypothesis that an active lifestyle delays the dementia onset was verified over a 9-year follow-up period. The lifestyle factors of the mental, social and physical component scores estimated in a previous study (study II) were studied in relation to age at dementia onset. Results showed that dementia developed at a significantly later age in individuals who had a higher level of participation in activities with high physical, mental or social components. When the three components were integrated, we found that the broader spectrum of participation (higher levels in at least two of the components) the later the age at dementia onset (β 0.62; P<0.01). Conclusions. Even in the advanced age, elderly persons are still active, being limited in their participation only by mental disorders or by physical limitation. An active lifestyle, defined as a higher level of participation in leisure activities with either mental, social or physical component may decrease the risk of dementia and postpone its onset.

Place, publisher, year, edition, pages
Stockholm: Karolinska Institutet, 2009. 59 p.
Keyword
Demens
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:rkh:diva-1049 (URN)9789174094022 (ISBN)
Available from: 2014-09-25 Created: 2014-09-17 Last updated: 2015-01-28Bibliographically approved

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