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Intra-individual variability and measurement noise in estimates of energy expenditure by whole body indirect calorimetry

Published online by Cambridge University Press:  09 March 2007

P. R. Murgatroyd ,
H. L. Davies  and
A. M. Prentice
P. R. Murgatroyd
Affiliation:
MRC Dunn Clinical Nutrition Centre, 100 Tennis Court Road, Cambridge CB2 1QL
H. L. Davies
Affiliation:
MRC Dunn Clinical Nutrition Centre, 100 Tennis Court Road, Cambridge CB2 1QL
A. M. Prentice
Affiliation:
MRC Dunn Clinical Nutrition Centre, 100 Tennis Court Road, Cambridge CB2 1QL
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Abstract

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1. Four men were each studied continuously over 12 d in a whole-body calorimeter. Dietary intake and daily activities were kept constant throughout the study.

2. Day-to-day coefficients of variation in energy expenditure within subjects were found to be 1.97% over 24 h, 5.93% during basal metabolic rate measurement, 2.40% overnight and 3.22% in exercise.

3. The contribution of measurement system noise to the observed variability was analysed and shown to be generally small. The source of this noise was considered.

4. The results reinforce and extend other comparable reports and show that within-subject variability forms a small part of reported observations of between-subject variability.

Type
Clinical and Human Nutrition papers: Studies in Man
Information
British Journal of Nutrition , Volume 58 , Issue 3 , November 1987 , pp. 347 - 356
Copyright
Copyright © The Nutrition Society 1987

References

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