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Physical frailty in older adults is associated with metabolic and atherosclerotic risk factors and cognitive impairment independent of muscle mass

  • JNHA: Sarcopenia Frailty and Performance
  • Published:
The journal of nutrition, health & aging

Abstract

Objective

Metabolic and atherosclerotic diseases are known risk factors for disability in old age, and can result in sarcopenia as well as cognitive impairment, which are both components of frailty syndrome. As muscle loss increases with ageing, it is unclear whether muscle loss per se, or the diseases themselves, are the underlying cause of physical frailty in those suffering from these diseases. We tested the hypothesis that metabolic and atherosclerotic diseases and cognitive impairment are associated with physical frailty independent of muscle loss in old age, and further examined their impact on the relationship between physical frailty and mortality.

Design

Prospective.

Setting

Community.

Participants

4000 community dwelling Chinese elderly ≥65 years.

Measurements

Diabetes, hypertension, stroke, heart disease, cognitive impairment, smoking, physical activity, waist hip ratio (WHR) and ankle-brachial index (ABI)) were recorded. Physical frailty measurements (grip-strength, chair-stands, stride length and 6-metre walks) were summarized into a composite frailty score (0–20), 0 being the most frail) according to quartiles of performance. Appendicular muscle mass (ASM) was measured using dual X-ray absorptiometry. Relationships between the score and covariates were analyzed. Cox regression was used to study the impact of metabolic and atnerosclerotic risk factors on the relationship between physical frailty and 6-year mortality.

Results

After adjustment for ASM, all metabolic diseases and indexes, and cognitive impairment were significantly associated with the composite physical frailty score in univariate analysis. In multivariate analysis, cognitive impairment, high WHR, diabetes, stroke and heart disease were all independently associated with higher physical frailty with adjustment for age, physical activity level and ASM. Hypertension was associated with physical frailty in men but not in women. In Cox regression, increased physical frailty was associated with higher 6-year mortality. The impact of metabolic and atherosclerotic risk factors was however only modest after adjustment for age and cognitive function.

Conclusion

Metabolic and atherosclerotic diseases and high WHR, was associated with physical frailty, independent of their adverse effect on cognitive function and muscle mass.

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Authors and Affiliations

  1. Division of Geriatrics, Department of Medicine & Therapeutics, The Chinese University of Hong Kong, Hong Kong SAR, China

    Jenny S. W. Lee, T. Kwok & J. Woo

  2. Department of Medicine and Geriatrics, Shatin Hospital, Hong Kong SAR, China

    Jenny S. W. Lee

  3. The S H Ho Centre of Gerontology and Geriatrics, The Chinese University of Hong Kong, Hong Kong, Hong Kong SAR, China

    T. -W. Auyeung & J. Woo

  4. Jockey Club Centre for Osteoporosis Care and Control, The Chinese University of Hong Kong, Hong Kong SAR, China

    J. Leung & P. -C. Leung

  5. Division of Geriatrics, Department of Medicine & Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China

    Jenny S. W. Lee

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  1. Jenny S. W. Lee
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  2. T. -W. Auyeung
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  3. J. Leung
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  4. T. Kwok
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  5. P. -C. Leung
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  6. J. Woo
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Correspondence to Jenny S. W. Lee.

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Lee, J.S.W., Auyeung, T.W., Leung, J. et al. Physical frailty in older adults is associated with metabolic and atherosclerotic risk factors and cognitive impairment independent of muscle mass. J Nutr Health Aging 15, 857–862 (2011). https://doi.org/10.1007/s12603-011-0134-1

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  • DOI: https://doi.org/10.1007/s12603-011-0134-1

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