Validation of the BodygemTM Hand-held Indirect ... - New Line Medical
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Validation of the BodygemTM Hand-held Indirect ... - New Line Medical
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Validation of the BodygemTM Hand-held Indirect Calorimeter Edward L. Melanson1, Ligia B. Coelho1, Zung V. Tran2, Heather A. Haugen3, Jay T. Kearney3, and James O. Hill1 Center for Human Nutrition and 2Department of Preventive Medicine and Biometrics, University of Colorado Health Sciences Center, Denver, CO.3, HealtheTech, Inc., Golden, CO 1
Abstract Background: Indirect calorimetry using a metabolic cart is the standard by which resting metabolic rate (RMR) is measured in research settings, but this method is not practical in clinical settings. Objective: To assess the validity and reliability of a hand-held indirect calorimeter, using measurements obtained from a standard metabolic cart as the criterion measure. Design: RMR was measured on two mornings in 47 healthy adults. On each morning, RMR was measured using both a metabolic cart (SM-2900) and the BodyGemTM (BG) hand-held indirect calorimeter. Body composition was determined using dual-energy X-ray absorptiometry. Results: There were no trial-to-trial differences in RMR measured by the BG (1614 ± 39 vs. 1600 ± 39 kcal.d-1) or the SM-2900 (1529 ± 39 vs. 1528 ± 40 kcal.d-1). Trial-to-trial intraclass reliability coefficients were acceptably high for both the BG (R=0.92, 95% CI=0.85 to 0.96) and SM-2900 (R=0.97, 95% CI= 0.94 to 0.98). RMR measured by the BG was significantly higher than that measured by the SM-2900 during both trial 1 (mean difference, 85 ± 18 kcal.d-1, p=0.0001) and trial 2 (72 ± 19 kcal.d-1, p=0.0001). FFM was strongly correlated with RMR measured by the BG (r=0.86, p
