Body composition in elderly people: effect of criterion estimates on predictive equations
- 1 June 1991
- journal article
- research article
- Published by Elsevier BV in The American Journal of Clinical Nutrition
- Vol. 53 (6), 1345-1353
- https://doi.org/10.1093/ajcn/53.6.1345
Abstract
The purposes of this study were to determine whether there are significant differences between two- and four-compartment model estimates of body composition, whether these differences are associated with aqueous and mineral fractions of the fat-free mass (FFM); and whether the differences are retained in equations for predicting body composition from anthropometry and bioelectric resistance. Body composition was estimated in 98 men and women aged 65–94 y by using a four-compartment model based on hydrodensitometry, 3H2O dilution, and dual-photon absorptiometry. These estimates were significantly different from those obtained by using Siri's two-compartment model. The differences were associated significantly (P < 0.0001) with variation in the aqueous fraction of FFM. Equations for predicting body composition from anthropometry and resistance, when calibrated against two-compartment model estimates, retained these systematic errors. Equations predicting body composition in elderly people should be calibrated against estimates from multicompartment models that consider variability in FFM composition.This publication has 20 references indexed in Scilit:
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