Validity of single-site and multi-site models for estimating body composition of women using near-infrared interactance

American Journal of Human Biology : the Official Journal of the Human Biology Council
V H HeywardS B Going

Abstract

The purpose of this study was to develop a multi-site near-infrared (NIR) model (Model I) and compare its predictive accuracy to single-site models (IIA and IIB). In Model I, the sum of two optical density (OD) measures (Σ2OD), age, body weight, height, and physical activity level were used as potential predictors of body density (Db ). In Model IIA, the variables used in the manufacturer's NIR equation (biceps OD1 and OD2 , body weight, height, gender, and physical activity level) were the potential predictors. This model was modified by including age as an additional potential predictor in Model IIB. We also examined the test-retest reliability and interrelationships of OD measures taken at 10 anatomical sites, as well as the validity of the manufacturer's NIR equation, for estimating body composition of women. The subjects, 148 women between 20 and 72 years, were hydrostatically weighed to determine criterion Db . The Futrex-5000 was used to measure OD1 and OD2 at 10 anatomical sites. Only two sites (pectoral OD2 and biceps OD2 ) contributed significantly to the variance in Db . Thus, the sum of these two ODs (Σ2OD), was used as a potential predictor in the multi-site model. Test-retest reliability was high, with intraclass ...Continue Reading

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Citations

Sep 16, 2004·American Journal of Human Biology : the Official Journal of the Human Biology Council·Grazyna Jasienska, Peter T Ellison
Nov 5, 1998·Proceedings. Biological Sciences·G Jasieńska, P T Ellison
Jan 1, 1994·American Journal of Human Biology : the Official Journal of the Human Biology Council·Komei HattoriHisashi Mitani
May 29, 2004·Journal of Physiology and Biochemistry·P A Martínez-CarpioA Corominas
Sep 20, 2000·The Journal of Orthopaedic and Sports Physical Therapy·R A OppligerD H Nielsen
Dec 1, 1992·Research Quarterly for Exercise and Sport·J A QuatrochiW L Wilson
Feb 29, 2000·Medicine and Science in Sports and Exercise·V L HicksR N Baumgartner

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