Abstract
Background: A knowledge of energy expenditure in infancy is required for the estimation of recommended daily amounts of food energy, for designing artificial infant feeds, and as a reference standard for studies of energy metabolism in disease states.
Objective: The objectives of this study were to construct centile reference charts for total energy expenditure (TEE) in infants across the first year of life.
Methods: Repeated measures of TEE using the doubly labeled water technique were made in 162 infants at 1.5, 3, 6, 9 and 12 months. In total, 322 TEE measurements were obtained. The LMS method with maximum penalized likelihood was used to construct the centile reference charts. Centiles were constructed for TEE expressed as MJ/day and also expressed relative to body weight (BW) and fat-free mass (FFM).
Results: TEE increased with age and was 1.40,1.86, 2.64, 3.07 and 3.65 MJ/day at 1.5, 3, 6, 9 and 12 months, respectively. The standard deviations were 0.43, 0.47, 0.52,0.66 and 0.88, respectively. TEE in MJ/kg increased from 0.29 to 0.36 and in MJ/day/kg FFM from 0.36 to 0.48.
Conclusions: We have presented centile reference charts for TEE expressed as MJ/day and expressed relative to BW and FFM in infants across the first year of life. There was a wide variation or biological scatter in TEE values seen at all ages. We suggest that these centile charts may be used to assess and possibly quantify abnormal energy metabolism in disease states in infants.
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Acknowledgements
We gratefully acknowledge the families and infants who so generously volunteered their time for this research. This study was supported in part by a grant from the National Health and Medical Research Council of Australia. We also acknowledge the support of the Royal Children's Hospital Foundation, Brisbane. Australia.
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Guarantor: PSW Davies.
Contributors: CAR wrote the paper, interpreted the results, performed statistical analysis and maintained the Australian cohort, PSWD supervised the writing of the paper and interpretation of results and co-maintained the UK cohort, JCKW co-maintained the UK cohort, and LMA performed TEE analysis for the Australian cohort, and GC and RWS co-supervised the Australian study. All contributors edited the final draft of the paper.
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Reichman, C., Davies, P., Wells, J. et al. Centile reference charts for total energy expenditure in infants from 1 to 12 months. Eur J Clin Nutr 57, 1060–1067 (2003). https://doi.org/10.1038/sj.ejcn.1601642
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DOI: https://doi.org/10.1038/sj.ejcn.1601642