2.50
Hdl Handle:
http://hdl.handle.net/2436/620565
Title:
Scaling children's waist circumference for differences in body size
Authors:
Nevill, Alan M; Duncan, Michael J. ( 0000-0002-2016-6580 ) ; Lahart, Ian M ( 0000-0003-1079-2876 ) ; Davies, Paul; Ramirez-Velez, Robinson ( 0000-0003-3075-6960 ) ; Sandercock, Gavin
Abstract:
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.
Citation:
Scaling children's waist circumference for differences in body size 2017:e23037 American Journal of Human Biology
Publisher:
Wiley
Journal:
American Journal of Human Biology
Issue Date:
12-Jul-2017
URI:
http://hdl.handle.net/2436/620565
DOI:
10.1002/ajhb.23037
Additional Links:
http://doi.wiley.com/10.1002/ajhb.23037
Type:
Article
Language:
en
ISSN:
1042-0533
Appears in Collections:
Exercise and Health

Full metadata record

DC FieldValue Language
dc.contributor.authorNevill, Alan Men
dc.contributor.authorDuncan, Michael J.en
dc.contributor.authorLahart, Ian Men
dc.contributor.authorDavies, Paulen
dc.contributor.authorRamirez-Velez, Robinsonen
dc.contributor.authorSandercock, Gavinen
dc.date.accessioned2017-07-28T13:06:31Z-
dc.date.available2017-07-28T13:06:31Z-
dc.date.issued2017-07-12-
dc.identifier.citationScaling children's waist circumference for differences in body size 2017:e23037 American Journal of Human Biologyen
dc.identifier.issn1042-0533en
dc.identifier.doi10.1002/ajhb.23037-
dc.identifier.urihttp://hdl.handle.net/2436/620565-
dc.description.abstractObjectives 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.en
dc.language.isoenen
dc.publisherWileyen
dc.relation.urlhttp://doi.wiley.com/10.1002/ajhb.23037en
dc.rightsArchived with thanks to American Journal of Human Biologyen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAllometric scalingen
dc.subjectwaist circumferenceen
dc.subjectchildrenen
dc.titleScaling children's waist circumference for differences in body sizeen
dc.typeArticleen
dc.identifier.journalAmerican Journal of Human Biologyen
dc.contributor.institutionFaculty of Education; Health and Wellbeing, University of Wolverhampton; Walsall Campus Walsall United Kingdom-
dc.contributor.institutionFaculty of Health and Life Sciences; Coventry University; Coventry United Kingdom-
dc.contributor.institutionFaculty of Education; Health and Wellbeing, University of Wolverhampton; Walsall Campus Walsall United Kingdom-
dc.contributor.institutionFaculty of Education; Health and Wellbeing, University of Wolverhampton; Walsall Campus Walsall United Kingdom-
dc.contributor.institutionCentro de Estudios en Medición de la Actividad Física (CEMA), Universidad del Rosario; Bogotá Cundinamarca Colombia-
dc.contributor.institutionSchool of Biological Sciences; University of Essex; Colchester United Kingdom-
dc.date.accepted2017-06-
rioxxterms.funderInternalen
rioxxterms.identifier.projectUoW280717ILen
rioxxterms.versionAMen
rioxxterms.licenseref.urihttps://creativecommons.org/CC BY-NC-ND 4.0en
rioxxterms.licenseref.startdate2018-07-12en
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