Comparison of a Bioelectrical Impedance Device against the Reference Method Dual Energy X-Ray Absorptiometry and Anthropometry for the Evaluation of Body Composition in Adults

Nutrients

Kaitlin Day¹  Fernanda Mata¹  Alastair Kwok¹  Alison Evans¹  Helen Truby¹  Kathryn Hart²  LeighC. Ward³  Antonio Verdejo-Garcia⁴ 

[1] Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, VIC 3168, Australia;Department of Nutritional Sciences, University of Surrey, Guildford GU2 7XH, UK;School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia;School of Psychological Sciences, Monash University, Clayton, VIC 3168, Australia;

关键词: body composition;    dual X-ray absorptiometry;    bioelectrical impedance;    validation;    anthropometry;   

DOI  :  10.3390/nu10101469

来源: DOAJ

【 摘 要 】

This study aimed to compare the use of the bioelectrical impedance device (BIA) seca® mBCA 515 using dual X-ray absorptiometry (DXA) as a reference method, for body composition assessment in adults across the spectrum of body mass indices. It explores the utility of simple anthropometric measures (the waist height ratio (WHtR) and waist circumference (WC)) for the assessment of obesity. In the morning after an overnight fast (10 h), 30 participants underwent a body composition DXA (GE iDXA) scan, BIA (seca 515), and anthropometric measures. Compared to the DXA reference measure, the BIA underestimated fat mass (FM) by 0.32 kg (limits of agreement −3.8 kg, 4.4 kg); overestimated fat free mass (FFM) by 0.43 kg (limits of agreement −8.2 kg, 4.3 kg). Some of the variation was explained by body mass index (BMI), as for FM, the mean difference of the normal range BMI group was smaller than for the overweight/obese group (0.25 kg and 0.35 kg, respectively) with wider limits of agreement (−4.30 kg, 4.81 kg, and −3.61 kg, 4.30 kg, respectively). There were significant differences in visceral adipose tissue (VAT) volume measurements between methods with BIA systematically overestimating VAT compared to DXA. WC was more strongly correlated with DXA FM (rho = 0.90, p < 0.001) than WHtR (rho = 0.83, p < 0.001). BIA had some agreement with DXA; however, they are not equivalent measures for the range of BMIs explored, with DXA remaining the more informative tool. WC is a useful and simple assessment tool for obesity.

【 授权许可】

Unknown