Comparison of the Cosmed K4 b2 and the Deltatrac II™ metabolic cart in measuring resting energy expenditure in adults

Littlewood, R. A., White, M. S., Bell, K. L., Davies, P. S. W., Cleghorn, Geoffrey J., & Grote, R. (2002) Comparison of the Cosmed K4 b2 and the Deltatrac II™ metabolic cart in measuring resting energy expenditure in adults. Clinical Nutrition, 21(6), pp. 491-497.

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Background and Aims: The objective of the study was to compare data obtained from the Cosmed K4 b2 and the Deltatrac II™ metabolic cart for the purpose of determining the validity of the Cosmed K4 b2 in measuring resting energy expenditure. Methods: Nine adult subjects (four male, five female) were measured. Resting energy expenditure was measured in consecutive sessions using the Cosmed K4 b2, the Deltatrac II™ metabolic cart separately and the Cosmed K4 b2 and Deltatrac II™ metabolic cart simultaneously, performed in random order. Resting energy expenditure (REE) data from both devices were then compared with values obtained from predictive equations. Results: Bland and Altman analysis revealed a mean bias for the four variables, REE, respiratory quotient (RQ), VCO2, VO2 between data obtained from Cosmed K4 b2 and Deltatrac II™ metabolic cart of 268 ± 702 kcal/day, -0.0±0.2, 26.4±118.2 and 51.6±126.5 ml/min, respectively. Corresponding limits of agreement for the same four variables were all large. Also, Bland and Altman analysis revealed a larger mean bias between predicted REE and measured REE using Cosmed K4 b2 data (-194±603 kcal/day) than using Deltatrac™ metabolic cart data (73±197 kcal/day). Conclusions: Variability between the two devices was very high and a degree of measurement error was detected. Data from the Cosmed K4 b2 provided variable results on comparison with predicted values, thus, would seem an invalid device for measuring adults. © 2002 Elsevier Science Ltd. All rights reserved.

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ID Code: 89508
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :21
Export Date: 1 September 2015
Correspondence Address: Littlewood, R.A.; Royal Children's Hospital, Statewide Paediatric Rehab. Service, Coles Building, Herston, QLD 4029, Australia
Keywords: Cosmed, Deltatrac, REE, Resting energy expenditure, adult, article, basal metabolic rate, calorimeter, clinical article, controlled study, energy expenditure, female, human, intermethod comparison, male, measurement, prediction and forecasting, reference value, respiratory quotient, statistical analysis, validation process, calibration, calorimetry, comparative study, energy metabolism, lung ventilation, metabolism, methodology, oxygen consumption, reproducibility, telemetry, validation study, carbon dioxide, oxygen, Basal Metabolism, Calorimetry, Indirect, Humans, Predictive Value of Tests, Pulmonary Ventilation, Reproducibility of Results
DOI: 10.1054/clnu.2002.0580
ISSN: 0261-5614
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Deposited On: 04 Nov 2015 05:33
Last Modified: 26 Jun 2017 03:01

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