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Comparative evaluation of body composition in medically stable elderly

R S Hurley1, B J Bartlett, D D Witt

  • 1Program for Nutrition Intervention, School of Home Economics and Family Ecology, University of Akron, OH 44325-6103, USA.

Journal of the American Dietetic Association
|October 23, 1997
PubMed
Summary

Accurate body composition assessment is crucial for elderly nutritional status. A lean-to-height index, using knee height, is a useful tool, especially for elderly black women, as stature can decrease with age.

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Area of Science:

  • Gerontology
  • Nutritional Science
  • Anthropometry

Background:

  • Accurate nutritional status assessment is vital for the elderly population.
  • Body composition measurement methods require evaluation for this demographic.
  • Anthropometric data can describe body composition in older adults.

Purpose of the Study:

  • To describe the body composition of elderly individuals (Black and White, aged 55-89).
  • To explore the utility of various body composition measurement techniques.
  • To assess the impact of gender, race, and age on body composition variables.

Main Methods:

  • A longitudinal study collected baseline anthropometric data from 129 free-living elderly individuals.
  • Body composition variables, including lean and lean-to-height measures, were analyzed.

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  • Descriptive statistics and analysis of variance were used, stratified by gender, race, and age groups.

    • Main Results:

    • Significant differences in body composition were observed across gender, race, and age groups.
    • Black women exhibited higher weight, BMI, and lean-to-height ratio but lower percent lean body mass than white women.
    • Older adults (over 75) were shorter, lighter, and had a lower lean-to-height ratio, with gender and age significantly affecting this index.

    Conclusions:

    • A lean-to-height index is a valuable tool for monitoring elderly lean mass status.
    • Knee height is a particularly useful measure as it does not decrease with age, unlike stature.
    • Existing equations for estimating stature from knee height may require adjustments for elderly Black women.