Abstract
Background
To study the predictive factors of resting energy expenditure (REE) and evaluate the accuracy of predicted equations with indirect calorimeter (IC) in Chinese school-age children, particularly for the obese population.
Methods
Recruited children were from the department of child healthcare in Nanjing children’s hospital during July 2014–September 2015. Anthropometric parameters and body composition were measured by bioelectrical impedance. Measured REE was assessed by IC. Predicted REE was estimated using ten published equations.
Results
248 children aged 7–13 years were recruited, including 148 obese [body mass index standard deviation score (BMISDS) = 2.48 ± 0.91] and 100 non-obese (BMISDS = − 0.96 ± 1.08). The unit mass of REE (REE/kg) in obese group (29.06 ± 5.74) was lower than that in non-obese group (37.51 ± 6.56). The stepwise regression showed that age, BMISDS and fat-free mass (FFM) had a major impact on REE/kg as the regression equation: Y = 54.41 − 1.36 × X1 − 2.25 × X2 − 0.16 × X3 (Y REE/kg, X1 age, X2 BMISDS, X3 FFM; R = 0.633, R2 = 0.401, P < 0.01). The accuracy of predicted REE in obese subjects was 62.16% by the new predictive equations.
Conclusions
The REE/kg in obese children was lower and closely correlated with age, BMISDS and FFM. It is necessary to validate the new predictive equation in a larger sample to estimate energy requirements, particularly for children with obesity.
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Acknowledgements
The authors gratefully acknowledge the contributions of the doctors and nurses of the Nanjing Children Hospital and the participation of the adolescents and their parents.
Funding
This work was supported by grants from Jiangsu Province Research Project (BE2015607) and National Natural Science Foundation (81273064).
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Li XN designed the research, collected clinical data, and wrote the manuscript. Zhang L collected clinical data, analyzed the data, and wrote the manuscript. Chen R, Li R, Chen MY and Huang R collected clinical data. All authors read and approved the final manuscript.
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The study “Evaluating the predictive factors of resting energy expenditure and validating predictive equations for Chinese obese children” was approved by the Research Ethics Committee of Children’s Hospital of Nanjing Medical University, China (No.201412004-1) and conducted according to the principles in the Declaration of Helsinki and its later amendments or comparable ethical clinical standards. All of the enrolled subjects and their parents were fully informed about the procedure and the purpose of this study and written consent was obtained from the parents of all children before inclusion.
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No competing financial interests exist.
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Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.
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Zhang, L., Chen, R., Li, R. et al. Evaluating the predictive factors of resting energy expenditure and validating predictive equations for Chinese obese children. World J Pediatr 14, 160–167 (2018). https://doi.org/10.1007/s12519-017-0111-9
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DOI: https://doi.org/10.1007/s12519-017-0111-9