Bio-electrical impedance vector analysis: testing Piccoli's model against objective body composition data in children and adolescents

European Journal of Clinical Nutrition
Jonathan C K WellsMary S Fewtrell

Abstract

Bio-electrical impedance (BI) analysis is a simple body composition method ideal for children. However, its utility in sick or malnourished children is complicated by variability in hydration. BI vector analysis (BIVA) potentially resolves this, using a theoretical model that differentiates hydration from cell mass. We tested this model against reference methods in healthy children varying widely in age and nutritional status. We compiled body composition data from 291 children and adolescents (50% male) aged 4-20 years of European ancestry. Measurements included anthropometry, BIVA outcomes (height-adjusted resistance (R/H) and reactance (Xc/H); phase angle (PA)), and fat-free mass (FFM), fat mass (FM) and FFM-hydration (HFFM) by the criterion 4-component model. All outcomes were converted to age- and sex-standardised standard deviation scores (SDS). Graphic analysis and regression analysis were used to evaluate the BIVA model. R/H and Xc/H declined with age in curvilinear manner, whereas PA increased linearly with age. R/H-SDS and Xc-SDS were negatively correlated with FFM-SDS, HFFM-SDS. and FM-SDS. PA was positively correlated with FFM-SDS but unrelated to HFFM-SDS and FM-SDS. While previous studies of adults with major flui...Continue Reading

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Oct 19, 2012·The American Journal of Clinical Nutrition·Jonathan C K WellsMary S Fewtrell
Jul 21, 2015·Clinical Nutrition : Official Journal of the European Society of Parenteral and Enteral Nutrition·Tsinuel GirmaJonathan C K Wells
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Citations

Apr 23, 2019·Food & Nutrition Research·Karina M VermeulenSancha H L Vale
Aug 14, 2020·Clinical Nutrition : Official Journal of the European Society of Parenteral and Enteral Nutrition·Jonathan Ck WellsMary S Fewtrell
Oct 9, 2021·European Journal of Clinical Nutrition·Camila E OrssoCarla M Prado

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Software Mentioned

Piccoli
Excel
BIVA

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