title: Validity of Four Commercial Bioelectrical Impedance Scales in Measuring Body Fat among Chinese Children and Adolescents.
abstract: The aim of the study is to examine the validity in predicting body fat percentage (%BF) of different bioelectrical impedance (BIA) devices among Chinese children and adolescents. A total of 255 Chinese children and adolescents aged 9-19 years old participated in the study. %BF was assessed by BIA scales, namely, Biodynamics-310 (Model A), Tanita TBF-543 (Model B), Tanita BC-545 (Model C), and InBody 520 (Model D). Dual-energy X-ray absorptiometry (DXA) was used as the criterion measurement. Lin's concordance correlation coefficients of estimated %BF between Model A, Model B, Model C, and DXA showed poor agreements for both genders. Moderate agreements for %BF were found between DXA and Model D measurements. In boys, differences in %BF were found between DXA and Model B and Model C. No significant %BF differences were found between Model A, Model D, and DXA. However, the two BIA analyzers showed a significant positive correlation between the bias and average %BF between BIA and DXA. In girls, differences in %BF were observed between Model B, Model C, Model D, and DXA. Model A and DXA showed no significant differences of %BF; however, the bias and the average %BF between the BIA and DXA had a significant positive correlation. Using embedded equations in BIA devices should be validated in assessing the %BF of Chinese children and adolescents.
authors.affiliation: Center for Sports Medicine and Rehabilitation, Shanghai University of Sport, Shanghai 200438, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong.
authors.forename: Stanley Sai-Chuen
authors.initials: SS
authors.lastname: Hui
mesh_terms: D050154:Adiposity / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D000886:Anthropometry; D044466:Asian People / Q000706:statistics & numerical data*; D001823:Body Composition / Q000502:physiology*; D015992:Body Mass Index; D001837:Body Weights and Measures / Q000379:methods* / Q000592:standards*; D002648:Child; D017097:Electric Impedance; D005260:Female; D006801:Humans; D008297:Male; D055815:Young Adult