Cited by 8Body Composition Measurement TechniquesObesity, Physical Activity, DietElectrical and Bioimpedance Tomography

Development of population-specific prediction equations for bioelectrical impedance analyses in Vietnamese children

Open access
Nguyen, Phuong Hong, Young, Melissa F., Khuong, Long Quynh, Ramakrishnan, Usha, Martorell, Reynaldo, Hoffman, Daniel J.·2020·British Journal of Nutrition

Abstract

There is a need for accurate, inexpensive and field-friendly methods to assess body composition in children. Bioelectrical impedance analysis (BIA) is a promising approach; however, there have been limited validation and use among young children in resource-poor settings. We aim to develop and validate population-specific prediction equations for estimating total fat mass (FM), fat free-mass (FFM) and percentage body fat (PBF) in Vietnamese children (4–7 years) using reactance and resistance from BIA, anthropometric variables and demographic information. We conducted a cross-sectional survey of 120 children. Body composition was measured using dual-energy X-ray absorptiometry (DXA), BIA and anthropometry. To develop prediction equations, we split all data into development (70 %) and validation datasets (30 %). The model performance was evaluated using predicted residual error sum of squares, root mean squared error (RMSE), mean absolute error (MAE) and R2. We identified a top performing model with the least number of parameters (age, sex, weight and resistance index or resistance and height), low RMSE (FM 0·70, FFM 0·74, PBF 3·10), low MAE (FM 0·55, FFM 0·62, PBF 2·49), high R2(FM 0·95, FFM 0·92, PBF 0·82) and the least difference between predicted values and actual values from DXA (FM 0·03 kg or 0·01 sd, FFM 0·06 kg or 0·02 sd, PBF 0·27 % or 0·04 sd). In conclusion, we developed the first valid and highly predictive equations to estimate FM, FFM and PBF in Vietnamese children using BIA. These findings have important implications for future research on the double burden of disease and risks associated with overweight and obesity in young children.

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Crossref · 10.1017/s000711452000241x

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  • Concerns with applicability were high in 19 studies.

    “Concerns with applicability were high in 19 studies [37, 42–59] and unclear [41, 50, 60–69] in 12 studies due to the restricted sample size.”

    From High-standard predictive equations for estimating body composition using bioelectrical impedance analysis: a systematic review (2024) · cites this paper as [44]

    The Study setting and sample section (page unavailable) describes a convenience sample of 120 healthy children aged 4–7 from one Vietnamese city. The Discussion (page unavailable) cautions that the equations may not generalise to other ethnicities, supporting a concern about applicability. The paper does not assess applicability across 19 studies or assign itself a ‘high’ rating; that classification is not established by this source. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • Considering segmental technology for under 18 years old, five equations are available for estimating FFM in both sexes.

    “Considering segmental technology, five equations are available for estimating FFM in both sexes [43–45, 57, 74].”

    From High-standard predictive equations for estimating body composition using bioelectrical impedance analysis: a systematic review (2024) · cites this paper as [44]

    The Abstract reports FFM prediction equations for Vietnamese boys and girls aged 4–7, and the Measures section describes an eight-electrode BIA device. However, Measures says the equations used total-body resistance and reactance, not segmental measurements. The paper also does not establish that five segmental FFM equations are available across the cited studies. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Out of the 19 equations for under 18 years old, seven were developed using segmental technology.

    “Out of the 19 equations, 12 were developed using foot to hand technology [37, 55, 58, 59, 72, 73, 75, 76, 100] and seven equations were developed using segmental technology [43–45, 57, 74].”

    From High-standard predictive equations for estimating body composition using bioelectrical impedance analysis: a systematic review (2024) · cites this paper as [44]

    The Measures section describes an eight-electrode BIA device with electrodes on both hands and feet, and the Results section reports seven candidate models for fat mass. The paper does not classify its technology as segmental or establish the citing document’s aggregate count of seven segmental equations out of 19; those parts are not supported by this source alone. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • Regarding segmental technology for under 18 years old, five equations are suitable for both sexes.

    “Regarding segmental technology, five are suitable for both sexes [43–45, 57, 74].”
  • The remaining 12 studies on subjects under 18 years old were performed in different countries around the world and included both sexes.

    “Two of these studies were conducted in the USA, where no female participants were involved [55, 76], while the remaining 12 studies were performed in different countries around the world with both sexes included [37, 43–45, 57–59, 72–75, 100].”

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Authors
Nguyen, P. H., Young, M. F., Khuong, L. Q., Ramakrishnan, U., Martorell, R., & Hoffman, D. J.
Affiliations
  • International Food Policy Research Institute (US)
  • Emory University (US)
Venue
British Journal of Nutrition
Published
2020-07-03
Volume
124
Issue
12
Pages
1345-1352
ISSN
  • 0007-1145 (ISSN-L)
  • 1475-2662
OpenAlex
W3039896849
Cited by
8
References
46
Citations by year
2025: 2 · 2024: 3 · 2023: 2 · 2020: 1
FWCI
0.45
Type
journal article
Language
en
Open access
Locations
  • British Journal Of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • IFPRI E-brary (International Food Policy Research Institute) (submittedVersion, other-oa)
  • International Food Policy Research Institute (International Food Policy Research Institute) (submittedVersion, other-oa)
Funders
Rollins School of Public Health
Topics
  • Health Sciences › Medicine › Physiology › Body Composition Measurement Techniques
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrical and Bioimpedance Tomography
Keywords
bioelectrical impedance analysis, body composition, prediction equations, fat mass, fat-free mass, body fat percentage, children, Vietnamese children, reactance, resistance, anthropometry, equation validation, childhood obesity, double burden of disease
MeSH terms
Population Health, Clinical Decision Rules, Anthropometry, Body Composition, Child, Child, Preschool, Female, Humans, Male, Predictive Value of Tests, Vietnam, Absorptiometry, Photon, Electric Impedance, Asian People

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