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Related Experiment Videos

Performance-based physical function and future dementia in older people.

Li Wang1, Eric B Larson, James D Bowen

  • 1Health Services Research and Development Center of Excellence, VA Puget Sound Health Care System, Seattle, USA.

Archives of Internal Medicine
|May 24, 2006
PubMed
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Lower physical function is linked to a higher risk of developing dementia and Alzheimer's disease (AD). Maintaining good physical health may help delay the onset of these neurodegenerative conditions.

Area of Science:

  • Gerontology
  • Neuroscience
  • Public Health

Background:

  • The relationship between physical function and dementia progression is not well understood.
  • Investigating physical function's association with incident dementia and Alzheimer's disease (AD) is crucial.

Purpose of the Study:

  • To determine if physical function is associated with the incidence of dementia and AD.
  • To explore the predictive value of physical performance on cognitive decline.

Main Methods:

  • A prospective cohort study involving 2288 participants aged 65+ without dementia.
  • Baseline enrollment from 1994-1996 with follow-up through October 2003.
  • Incident dementia and AD were the primary outcome measures.

Main Results:

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  • Lower baseline physical function scores (< or = 10) were associated with a higher incidence rate of dementia (53.1 per 1000 person-years) compared to higher scores (> 10) (17.4 per 1000 person-years).
  • A 1-point decrease in physical function score correlated with increased dementia risk (HR, 1.08) and AD risk (HR, 1.06).
  • Poor physical performance also predicted a faster decline in cognitive abilities.

Conclusions:

  • Reduced physical performance is significantly associated with an elevated risk of dementia and AD.
  • Evidence suggests that diminished physical function may precede dementia onset, potentially indicating a role in disease pathogenesis.
  • Higher physical function levels may be linked to a delayed onset of dementia and AD.