Relative validity of bioelectrical impedance analysis in estimating body composition in women with overweight and obesity 2 weeks and 6 months postpartum.

IF 3.5 4区医学 Q2 FOOD SCIENCE & TECHNOLOGY

Food & Nutrition Research Pub Date : 2025-01-24 eCollection Date: 2025-01-01 DOI:10.29219/fnr.v69.10869

Elin Westerheim, Elisabeth A Øhman, Maria Fossli, Anna Winkvist, Hege Berg Henriksen, Hilde K Brekke

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引用次数: 0

Abstract

Objective: To investigate the relative validity of bioelectrical impedance analysis (BIA) in estimating fat mass (FM) and fat free mass (FFM) with dual-energy X-ray absorptiometry (DXA) as reference method in women with overweight and obesity 2 weeks and 6 months postpartum (pp).

Methods: Body composition of 94 women with overweight and obesity was assessed using Seca mBCA 515 and GE Healthcare Lunar iDXA. Agreement between the two methods for FM and FFM at 2 weeks and 6 months pp, as well as the changes in FM and FFM between the two timepoints, were tested using paired t-test, Bland-Altman plots and regression analyses.

Results: The mean (standard deviation [SD]) body mass index (BMI) at 2 weeks pp was 30.6 (2.6) kg/m² and mean (SD) weight loss at 6 months pp was 4.7 (4.8) kg. BIA underestimated FM at both 2 weeks pp and 6 months pp by mean (SD) 0.7 (1.4) kg and 0.3 (1.3) kg and overestimated FFM at both timepoints by 1.2 (1.5) kg and 0.7 (1.4) kg, with proportional bias for FFM. BIA underestimated changes in FM by mean (SD) 0.5 (1.1) kg and overestimated changes in FFM by 0.5 (1.0) kg, with proportional bias for change in extracellular water by total body water. Agreement was generally high for both cross-sectional and longitudinal comparisons.

Conclusions: At group level, BIA was a valid tool for assessment of FM and FFM in women with overweight and obesity at 2 weeks and 6 months pp when compared to DXA. We also consider it valid for following changes in FM and FFM over time when fluid distribution is stable.

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来源期刊

Food & Nutrition Research FOOD SCIENCE & TECHNOLOGY-NUTRITION & DIETETICS

CiteScore

5.20

自引率

9.10%

发文量

审稿时长

14 weeks

期刊介绍： Food & Nutrition Research is a peer-reviewed journal that presents the latest scientific research in various fields focusing on human nutrition. The journal publishes both quantitative and qualitative research papers. Through an Open Access publishing model, Food & Nutrition Research opens an important forum for researchers from academic and private arenas to exchange the latest results from research on human nutrition in a broad sense, both original papers and reviews, including: * Associations and effects of foods and nutrients on health * Dietary patterns and health * Molecular nutrition * Health claims on foods * Nutrition and cognitive functions * Nutritional effects of food composition and processing * Nutrition in developing countries * Animal and in vitro models with clear relevance for human nutrition * Nutrition and the Environment * Food and Nutrition Education * Nutrition and Economics Research papers on food chemistry (focus on chemical composition and analysis of foods) are generally not considered eligible, unless the results have a clear impact on human nutrition. The journal focuses on the different aspects of nutrition for people involved in nutrition research such as Dentists, Dieticians, Medical doctors, Nutritionists, Teachers, Journalists and Manufacturers in the food and pharmaceutical industries.