Scaling children's waist circumference for differences in body size

Objectives: Both waist circumference (WC) and body size (height) increase with age throughout childhood. Hence, there is a need to scale WC in children to detect differences in adiposity status (eg, between populations and different age groups), independent of body size/height. Methods: Using two cu...

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Autores Principales: Nevill, Alan M, Duncan, Michael J., Lahart, Ian M, Davies, Paul, Sandercock, Gavin, Ramírez-Vélez, Robinson
Formato: Artículo (Article)
Lenguaje:Inglés (English)
Publicado: Wiley-Liss Inc. 2017
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Acceso en línea:https://repository.urosario.edu.co/handle/10336/24118
https://doi.org/10.1002/ajhb.23037
id ir-10336-24118
recordtype dspace
spelling ir-10336-241182022-05-02T12:37:14Z Scaling children's waist circumference for differences in body size Nevill, Alan M Duncan, Michael J. Lahart, Ian M Davies, Paul Sandercock, Gavin Ramírez-Vélez, Robinson Adolescent Anthropometry Body height Body size Child Colombia England Female Human Male Obesity Procedures Waist circumference Adiposity Adolescent Anthropometry Body height Body size Child Colombia England Female Humans Male Waist circumference Objectives: Both waist circumference (WC) and body size (height) increase with age throughout childhood. Hence, there is a need to scale WC in children to detect differences in adiposity status (eg, between populations and different age groups), independent of body size/height. Methods: Using two culturally different samples, 1 English (10–15.9 years n = 9471) and 2 Colombian (14–15 years, n = 37,948), for WC to be independent of height (HT), a body shape index was obtained using the allometric power law WC = a.HTb. The model was linearized using log-transformation, and multiple regression/ANCOVA to estimate the height exponents for WC controlling for age, sex, and any other categorical/population differences. Results: In both samples, the power-law height exponent varied systematically with age. In younger children (age 10–11 years), the exponent was approximately unity, suggesting that pre-pubertal children might be geometrically similar. In older children, the height exponent declined monotonically to 0.5 (ie, HT0.5) in 15+ year-olds, similar to the exponent observed in adults. UK children's height-adjusted WC revealed a “u” shaped curve with age that appeared to reach a minimum at peak-height velocity, different for boys and girls. Comparing the WC of two populations (UK versus Colombian 14–15-year-old children) identified that the gap in WC between the countries narrowed considerably after scaling for height. Conclusions: Scaling children's WC for differences in height using allometric modeling reveals new insights into the growth and development of children's WC, findings that might well have been be overlooked if body size/height had been ignored. © 2017 Wiley Periodicals, Inc. 2017 2020-05-26T00:08:50Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 10420533 15206300 https://repository.urosario.edu.co/handle/10336/24118 https://doi.org/10.1002/ajhb.23037 eng info:eu-repo/semantics/openAccess application/pdf Wiley-Liss Inc. instname:Universidad del Rosario
institution EdocUR - Universidad del Rosario
collection DSpace
language Inglés (English)
topic Adolescent
Anthropometry
Body height
Body size
Child
Colombia
England
Female
Human
Male
Obesity
Procedures
Waist circumference
Adiposity
Adolescent
Anthropometry
Body height
Body size
Child
Colombia
England
Female
Humans
Male
Waist circumference
spellingShingle Adolescent
Anthropometry
Body height
Body size
Child
Colombia
England
Female
Human
Male
Obesity
Procedures
Waist circumference
Adiposity
Adolescent
Anthropometry
Body height
Body size
Child
Colombia
England
Female
Humans
Male
Waist circumference
Nevill, Alan M
Duncan, Michael J.
Lahart, Ian M
Davies, Paul
Sandercock, Gavin
Ramírez-Vélez, Robinson
Scaling children's waist circumference for differences in body size
description Objectives: Both waist circumference (WC) and body size (height) increase with age throughout childhood. Hence, there is a need to scale WC in children to detect differences in adiposity status (eg, between populations and different age groups), independent of body size/height. Methods: Using two culturally different samples, 1 English (10–15.9 years n = 9471) and 2 Colombian (14–15 years, n = 37,948), for WC to be independent of height (HT), a body shape index was obtained using the allometric power law WC = a.HTb. The model was linearized using log-transformation, and multiple regression/ANCOVA to estimate the height exponents for WC controlling for age, sex, and any other categorical/population differences. Results: In both samples, the power-law height exponent varied systematically with age. In younger children (age 10–11 years), the exponent was approximately unity, suggesting that pre-pubertal children might be geometrically similar. In older children, the height exponent declined monotonically to 0.5 (ie, HT0.5) in 15+ year-olds, similar to the exponent observed in adults. UK children's height-adjusted WC revealed a “u” shaped curve with age that appeared to reach a minimum at peak-height velocity, different for boys and girls. Comparing the WC of two populations (UK versus Colombian 14–15-year-old children) identified that the gap in WC between the countries narrowed considerably after scaling for height. Conclusions: Scaling children's WC for differences in height using allometric modeling reveals new insights into the growth and development of children's WC, findings that might well have been be overlooked if body size/height had been ignored. © 2017 Wiley Periodicals, Inc.
format Artículo (Article)
author Nevill, Alan M
Duncan, Michael J.
Lahart, Ian M
Davies, Paul
Sandercock, Gavin
Ramírez-Vélez, Robinson
author_facet Nevill, Alan M
Duncan, Michael J.
Lahart, Ian M
Davies, Paul
Sandercock, Gavin
Ramírez-Vélez, Robinson
author_sort Nevill, Alan M
title Scaling children's waist circumference for differences in body size
title_short Scaling children's waist circumference for differences in body size
title_full Scaling children's waist circumference for differences in body size
title_fullStr Scaling children's waist circumference for differences in body size
title_full_unstemmed Scaling children's waist circumference for differences in body size
title_sort scaling children's waist circumference for differences in body size
publisher Wiley-Liss Inc.
publishDate 2017
url https://repository.urosario.edu.co/handle/10336/24118
https://doi.org/10.1002/ajhb.23037
_version_ 1740172973905543168
score 12,131701