Estimating the effects of energy imbalance on changes in body weight in children

Swinburn, Boyd, Jolley, Damien, Kremer, Peter, Salbe, Arline D. and Ravussin, Eric 2006, Estimating the effects of energy imbalance on changes in body weight in children, American journal of clinical nutrition, vol. 83, no. 4, pp. 859-863.

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Title Estimating the effects of energy imbalance on changes in body weight in children
Author(s) Swinburn, Boyd
Jolley, Damien
Kremer, PeterORCID iD for Kremer, Peter
Salbe, Arline D.
Ravussin, Eric
Journal name American journal of clinical nutrition
Volume number 83
Issue number 4
Start page 859
End page 863
Publisher American Society for Nutrition
Place of publication New York, NY
Publication date 2006-04
ISSN 0002-9165
Keyword(s) energy intake
energy expenditure
energy balance
Summary BACKGROUND: Estimating changes in weight from changes in energy balance is important for predicting the effect of obesity prevention interventions. OBJECTIVE: The objective was to develop and validate an equation for predicting the mean weight of a population of children in response to a change in total energy intake (TEI) or total energy expenditure (TEE). DESIGN: In 963 children with a mean (+/-SD) age of 8.1 +/- 2.8 y (range: 4-18 y) and weight of 31.5 +/- 17.6 kg, TEE was measured by using doubly labeled water. Log weight (dependent variable) and log TEE (independent variable) were analyzed in a linear regression model with height, age, and sex as covariates. It was assumed that points of dynamic balance, called "settling points," occur for populations wherein energy is in balance (TEE = TEI), weight is stable (ignoring growth), and energy flux (EnFlux) equals TEE. RESULTS: TEE (or EnFlux) explained 74% of the variance in weight. The unstandardized regression coefficient was 0.45 (95% CI: 0.38, 0.51; R(2) = 0.86) after including covariates. Conversion into proportional changes (time(1) to time(2)) gave the equation (weight(2)/weight(1)) = (EnFlux(2)/EnFlux(1))(0.45). In 3 longitudinal studies (n = 212; mean follow-up of 3.4 y), the equation predicted the mean follow-up measured weight to within 0.5%. CONCLUSIONS: The relation of EnFlux with weight was positive, which implied that a high TEI (rather than low physical activity and low TEE) was the main determinant of high body weight. Two populations of children with a 10% difference in mean EnFlux would have a 4.5% difference in mean weight.
Language eng
Field of Research 111199 Nutrition and Dietetics not elsewhere classified
Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006, American Society for Nutrition
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