BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents

Background: Childhood obesity has become one of the most serious public health challenges in the 21st century in most developing countries. The percentile curve tool is useful for monitoring and screening obesity at population level, however, in China, no official recommendations on childhood body m...

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Main Authors:	Song, Peige, Li, Xue, Gasevic, Danijela, Flores, Ana Borges, Yu, Zengli
Format:	Online
Language:	English
Published:	MDPI 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4924046/

id	pubmed-4924046
recordtype	oai_dc
spelling	pubmed-49240462016-07-05 BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents Song, Peige Li, Xue Gasevic, Danijela Flores, Ana Borges Yu, Zengli Article Background: Childhood obesity has become one of the most serious public health challenges in the 21st century in most developing countries. The percentile curve tool is useful for monitoring and screening obesity at population level, however, in China, no official recommendations on childhood body mass index (BMI) and waist circumference (WC) reference percentiles have been made in practice. Aims: to construct the percentile reference values for BMI and WC, and then to calculate the prevalence of overall and abdominal obesity for Chinese children and adolescents. Methods: A total of 5062 anthropometric records for children and adolescents aged from 7 to 18 years (2679 boys and 2383 girls) were included for analysis. The participants were recruited as part of the national representative “China Health and Nutrition Survey” (CHNS). Age, gender, weight, height, and WC were assessed. Smoothed BMI and WC percentile curves and values for the 3rd, 5th, 10th, 15th, 25th, 50th, 75th, 85th, 90th, 95th and 97th percentiles were constructed by using the Lambda-Mu-Sigma (LMS) method. The prevalence estimates of the overall and abdominal obesity were calculated by using the cut-offs from our CHNS study and the previous “Chinese National Survey on Students’ Constitution and Health” (CNSSCH) study, respectively. The difference between prevalence estimates was tested by a McNemar test, and the agreement between these prevalence estimates was calculated by using the Cohen’s kappa coefficient. Results: The prevalence values of overall obesity based on the cut-offs from CHNS and CNSSCH studies were at an almost perfect agreement level in boys (κ = 0.93). However, among girls, the overall obesity prevalence differed between the studies (p < 0.001) and the agreement was weaker (κ = 0.76). The abdominal obesity prevalence estimates were significant different according to the two systems both in boys and girls, although the agreement reached to 0.88, which represented an almost perfect agreement level. Conclusions: This study provided new BMI and WC percentile curves and reference values for Chinese children and adolescents aged 7–18 years, which can be adopted in future researches. Large longitudinal study is still needed to reveal the childhood growth pattern and validate the inconsistence between different percentile studies. MDPI 2016-06-14 2016-06 /pmc/articles/PMC4924046/ /pubmed/27314368 http://dx.doi.org/10.3390/ijerph13060589 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Song, Peige Li, Xue Gasevic, Danijela Flores, Ana Borges Yu, Zengli
spellingShingle	Song, Peige Li, Xue Gasevic, Danijela Flores, Ana Borges Yu, Zengli BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents
author_facet	Song, Peige Li, Xue Gasevic, Danijela Flores, Ana Borges Yu, Zengli
author_sort	Song, Peige
title	BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents
title_short	BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents
title_full	BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents
title_fullStr	BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents
title_full_unstemmed	BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents
title_sort	bmi, waist circumference reference values for chinese school-aged children and adolescents
description	Background: Childhood obesity has become one of the most serious public health challenges in the 21st century in most developing countries. The percentile curve tool is useful for monitoring and screening obesity at population level, however, in China, no official recommendations on childhood body mass index (BMI) and waist circumference (WC) reference percentiles have been made in practice. Aims: to construct the percentile reference values for BMI and WC, and then to calculate the prevalence of overall and abdominal obesity for Chinese children and adolescents. Methods: A total of 5062 anthropometric records for children and adolescents aged from 7 to 18 years (2679 boys and 2383 girls) were included for analysis. The participants were recruited as part of the national representative “China Health and Nutrition Survey” (CHNS). Age, gender, weight, height, and WC were assessed. Smoothed BMI and WC percentile curves and values for the 3rd, 5th, 10th, 15th, 25th, 50th, 75th, 85th, 90th, 95th and 97th percentiles were constructed by using the Lambda-Mu-Sigma (LMS) method. The prevalence estimates of the overall and abdominal obesity were calculated by using the cut-offs from our CHNS study and the previous “Chinese National Survey on Students’ Constitution and Health” (CNSSCH) study, respectively. The difference between prevalence estimates was tested by a McNemar test, and the agreement between these prevalence estimates was calculated by using the Cohen’s kappa coefficient. Results: The prevalence values of overall obesity based on the cut-offs from CHNS and CNSSCH studies were at an almost perfect agreement level in boys (κ = 0.93). However, among girls, the overall obesity prevalence differed between the studies (p < 0.001) and the agreement was weaker (κ = 0.76). The abdominal obesity prevalence estimates were significant different according to the two systems both in boys and girls, although the agreement reached to 0.88, which represented an almost perfect agreement level. Conclusions: This study provided new BMI and WC percentile curves and reference values for Chinese children and adolescents aged 7–18 years, which can be adopted in future researches. Large longitudinal study is still needed to reveal the childhood growth pattern and validate the inconsistence between different percentile studies.
publisher	MDPI
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4924046/
_version_	1613600590326136832

BMI, Waist Circumference Reference Values for Chinese School-Aged Children and Adolescents

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