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Ventilatory capacity and risk for dementia.

R T Schaub1, H Münzberg, M Borchelt

  • 1Department of Psychiatry, Free University of Berlin, Germany. schaub@mail.uni-greifswald.de

The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
|November 15, 2000
PubMed
Summary

Reduced lung function, measured by spirometry, is linked to a higher risk of dementia in older adults. This suggests poor respiratory health may independently increase dementia risk.

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Area of Science:

  • Gerontology
  • Neurology
  • Pulmonology

Background:

  • Previous research linked ventilatory capacity indicators to cognitive function but not specifically dementia.
  • This study investigates the association between various ventilatory capacity measures and dementia in the elderly.

Purpose of the Study:

  • To examine the relationship between different spirometry-derived ventilatory capacity indicators and dementia.
  • To control for significant confounding factors in this relationship.

Main Methods:

  • Analysis of cross-sectional data from 437 participants (aged 70+) in the Berlin Aging Study (BASE).
  • Ventilatory capacity assessed via spirometry: peak expiratory flow rate (PEF-R), forced expiratory volume in 1 second (FEV-1), and maximal expiratory flow rates (MEF50%FVC, MEF25%FVC).

Related Experiment Videos

  • Logistic regression used to calculate odds ratios (OR) for dementia, adjusting for age, gender, education, ApoE4 status, COPD, smoking, heart failure, sensory function, grip strength, and physical activity.

    • Main Results:

    • Significantly increased odds of dementia were observed in participants with the lowest ventilatory capacity compared to the best-functioning group.
    • Odds ratios for dementia were elevated across all measured ventilatory capacity indicators: PEF-R (OR=20.4), FEV-1 (OR=7.5), MEF50%FVC (OR=4.3), and MEF25%FVC (OR=4.7).

    Conclusions:

    • Ventilatory capacity, assessed by spirometry, shows a cross-sectional association with dementia in a representative sample of the very elderly.
    • Findings suggest that diminished respiratory function may be an independent risk factor for dementia, even after accounting for known risk factors.