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Research ArticleOriginal Article
Open Access

Validity of the BodyGem calorimeter and prediction equations for the assessment of resting energy expenditure in overweight and obese Saudi males.

Ali M. Almajwal, Peter G. Williams and Marijka J. Batterham
Saudi Medical Journal July 2011, 32 (7) 718-724;
Ali M. Almajwal
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Peter G. Williams
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Marijka J. Batterham
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Abstract

OBJECTIVES: To assess the accuracy of resting energy expenditure (REE) measurement in a sample of overweight and obese Saudi males, using the BodyGem device (BG) with whole room calorimetry (WRC) as a reference, and to evaluate the accuracy of predictive equations.

METHODS: Thirty-eight subjects (mean ± SD, age 26.8± 3.7 years, body mass index 31.0± 4.8) were recruited during the period from 5 February 2007 to 28 March 2008. Resting energy expenditure was measured using a WRC and BG device, and also calculated using 7 prediction equations. Mean differences, bias, percent of bias (%bias), accurate estimation, underestimation and overestimation were calculated.

RESULTS: Repeated measures with the BG were not significantly different (accurate prediction: 81.6%; %bias 1.1± 6.3, p>0.24) with limits of agreement ranging from +242 to -200 kcal. Resting energy expenditure measured by BG was significantly less than WRC values (accurate prediction: 47.4%; %bias: 11.0± 14.6, p = 0.0001) with unacceptably wide limits of agreement. Harris-Benedict, Schofield and World Health Organization equations were the most accurate, estimating REE within 10% of measured REE, but none seem appropriate to predict the REE of individuals.

CONCLUSIONS: There was a poor agreement between the REE measured by WRC compared to BG or predictive equations. The BG assessed REE accurately in 47.4% of the subjects on an individual level.

  • Copyright: © Saudi Medical Journal

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Saudi Medical Journal: 32 (7)
Saudi Medical Journal
Vol. 32, Issue 7
1 Jul 2011
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Validity of the BodyGem calorimeter and prediction equations for the assessment of resting energy expenditure in overweight and obese Saudi males.
Ali M. Almajwal, Peter G. Williams, Marijka J. Batterham
Saudi Medical Journal Jul 2011, 32 (7) 718-724;

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Validity of the BodyGem calorimeter and prediction equations for the assessment of resting energy expenditure in overweight and obese Saudi males.
Ali M. Almajwal, Peter G. Williams, Marijka J. Batterham
Saudi Medical Journal Jul 2011, 32 (7) 718-724;
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© 2025 Saudi Medical Journal Saudi Medical Journal is copyright under the Berne Convention and the International Copyright Convention.  Saudi Medical Journal is an Open Access journal and articles published are distributed under the terms of the Creative Commons Attribution-NonCommercial License (CC BY-NC). Readers may copy, distribute, and display the work for non-commercial purposes with the proper citation of the original work. Electronic ISSN 1658-3175. Print ISSN 0379-5284.

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