NDLI: Genetic and Environmental Correlations Between Body Mass Index and Waist Circumference in China: The Qingdao Adolescent Twin Study

Content Provider	Springer Nature Link
Author	Ning, F. Silventoinen, K. Pang, Z. C. Kaprio, J. Wang, S. J. Zhang, D. Duan, H. P. Wu, W. F. Qiao, Q.
Copyright Year	2013
Abstract	We aimed to analyze how genetic and environmental factors account for variations in body mass index (BMI), waist circumference (WC) and their mutual correlation in Chinese children. We measured BMI and WC in 588 pairs of twins (53 % monozygotic twins) aged 8–17 years and applied structural equation modeling to the data. For the younger children (8–12 years of age), heritability estimates of BMI were 0.56 for boys and 0.69 for girls; for the older children (13–17 years of age), the corresponding figures were 0.64 and 0.71, respectively. We observed moderate heritability estimates in WC: the corresponding figures were 0.24 and 0.56 for the younger children, and 0.27 and 0.33 for the older children, respectively. The heterogeneity test for genetic variance of BMI and WC was statistically significant between the two age groups for both sexes (p < 0.001). The proportions of BMI and WC variations due to shared and non-shared environmental factors remained stable during childhood in both sexes. Bivariate genetic analyses showed that genetic correlations between BMI and WC were strong for the younger children (rg = 0.75 for boys, rg = 0.98 for girls) and the older children (rg = 1.0 for both boys and girls). Both sexes showed moderate non-shared environmental correlations in the two age groups, whereas shared environmental correlations––except among male younger children––were not statistically significant. Genetic factors play an important role in variations in BMI and WC during childhood. Common genetic and non-shared environmental factors explained most of the association between BMI and WC for both boys and girls.
Starting Page	340
Ending Page	347
Page Count	8
File Format	PDF
ISSN	00018244
Journal	Behavior Genetics
Volume Number	43
Issue Number	4
e-ISSN	15733297
Language	English
Publisher	Springer US
Publisher Date	2013-06-12
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Genetic factors Body mass index Waist circumference Children Twins Clinical Psychology Health Psychology Public Health
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics Genetics (clinical)

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