Leisure-time physical activity from mid- to late life, body mass index, and risk of dementia

Anna-Maija Tolppanen, Alina Solomon, Jenni Kulmala, Ingemar Kåreholt, Tiia Ngandu, Minna Rusanen, Tiina Laatikainen, Hilkka Soininen, Miia Kivipelto

Research output: Contribution to journalArticleScientificpeer-review

Abstract

BACKGROUND: Physical activity may be beneficial for cognition, but the effect may vary depending on personal characteristics.

METHODS: We investigated the associations between leisure-time physical activity (LTPA) from mid- to late life, the risk of dementia, and the role of body mass index, sex, and APOE in the CAIDE study during 28-year follow-up. Cognitive function of a random subsample was assessed at a mean age of 78.8 years (n = 1511), and dementia/Alzheimer's disease (AD) diagnoses were identified from national registers for the entire target population (n = 3559).

RESULTS: Moderate (hazard ratio [HR], 1.46; 95% confidence interval [CI], 1.08-1.99) and low levels of midlife LTPA (HR, 1.39; 95% CI, 0.99-1.95) were associated with higher risk of dementia in comparison with the most active category. The benefits were more pronounced among men, overweight individuals, and APOE ε4 noncarriers. Maintaining high LTPA (HR, 0.16; 95% CI, 0.06-0.41) or increasing LTPA (HR, 0.19; 95% CI, 0.09-0.40) after midlife was associated with lower dementia risk. Similar results were observed for AD.

CONCLUSIONS: The window of opportunity for preventive physical activity interventions may extend from midlife to older ages.

Original languageEnglish
Pages (from-to)434-443.e6
JournalAlzheimer's and dementia
Volume11
Issue number4
DOIs
Publication statusPublished - Apr 2015
Externally publishedYes
Publication typeA1 Journal article-refereed

Keywords

  • Age Factors
  • Aged
  • Aged, 80 and over
  • Body Mass Index
  • Community Health Planning
  • Dementia/diagnosis
  • Disease Progression
  • Female
  • Finland/epidemiology
  • Humans
  • Leisure Activities/psychology
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Motor Activity/physiology
  • Neuroimaging
  • Neuropsychological Tests
  • Proportional Hazards Models
  • Psychiatric Status Rating Scales
  • Risk Factors

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