PMID: 2496076Feb 1, 1989Paper

Sensitivity of methods for calculating energy expenditure by use of doubly labeled water

Journal of Applied Physiology
J L SealeC E Bodwell

Abstract

Attempts to estimate human energy expenditure by use of doubly labeled water have produced three methods currently used for calculating carbon dioxide production from isotope disappearance data: 1) the two-point method, 2) the regression method, and 3) the integration method. An ideal data set was used to determine the error produced in the calculated energy expenditure for each method when specific variables were perturbed. The analysis indicates that some of the calculation methods are more susceptible to perturbations in certain variables than others. Results from an experiment on one adult human subject are used to illustrate the potential for error in actual data. Samples of second void urine, 24-h urine, and breath collected every other day for 21 days are used to calculate the average daily energy expenditure by three calculation methods. The difference between calculated energy expenditure and metabolizable energy on a weight-maintenance diet is used to estimate the error associated with the doubly labeled water method.

Citations

Mar 1, 1995·Obesity Research·D A SchoellerK Shay
Dec 1, 1996·International Journal of Sport Nutrition·J L SealeJ M Conway
Jan 27, 2005·International Journal of Obesity : Journal of the International Association for the Study of Obesity·C KoebnickH J F Zunft
Feb 28, 2002·The American Journal of Clinical Nutrition·Joan M ConwayBarbara E Ainsworth
Mar 10, 2004·The British Journal of Nutrition·Alejandro E Macias

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