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Leisure activities in late life in relation to dementia risk: principal component analysis
Stéphanie Paillard-Borg1, Laura Fratiglioni, Bengt Winblad
1Aging Research Center (ARC), Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden. stephanie.paillard-borg@ki.se
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.
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