Assessment of body composition in Sri Lankan children: validation of a bioelectrical impedance prediction equation
Abstract
Objective To develop bioelectrical impedance analysis (BIA) equations to predict total body water (TBW) and fat-free mass (FFM) of Sri Lankan children.Subjects/methods Data were collected from 5- to 15-year-old healthy children. They were randomly assigned to validation (M/F: 105/83) and cross-validation (M/F: 53/41) groups. Height, weight and BIA were measured. TBW was assessed using isotope dilution method (D(2)O). Multiple regression analysis was used to develop preliminary equations and cross-validated on an independent group. Final prediction equation was constructed combining the two groups and validated by PRESS (prediction of sum of squares) statistics. Impedance index (height(2)/impedance; cm(2)/Omega), weight and sex code (male=1; female=0) were used as variables.Results Independent variables of the final prediction equation for TBW were able to predict 86.3% of variance with root means-squared error (RMSE) of 2.1 l. PRESS statistics was 2.1 l with press residuals of 1.2 l. Independent variables were able to predict 86.9% of variance of FFM with RMSE of 2.7 kg. PRESS statistics was 2.8 kg with press residuals of 1.4 kg. Bland Altman technique showed that the majority of the residuals were within mean bias+/-1.96 s.d.Conclusions Results of this study provide BIA equation for the prediction of TBW and FFM in Sri Lankan children. To the best of our knowledge there are no published BIA prediction equations validated on South Asian populations. Results of this study need to be affirmed by more studies on other closely related populations by using multi-component body composition assessment.
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As for TBW in under 18 years old, five equations are suitable for both sexes.
“As for TBW, five equations are suitable for both sexes [37, 58, 72, 75, 100].”
From High-standard predictive equations for estimating body composition using bioelectrical impedance analysis: a systematic review (2024) · cites this paper as [72]
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- Authors
- Wickramasinghe, V. P., Lamabadusuriya, S. P., Cleghorn, G. J., & Davies, P. S. W.
- Affiliations
- University of Colombo (LK)
- The University of Queensland (AU)
- Corresponding author
- Davies, P S W
- Venue
- European Journal of Clinical Nutrition
- Published
- 2007-08-15
- Volume
- 62
- Issue
- 10
- Pages
- 1170-1177
- ISSN
- 0954-3007 (ISSN-L)
- 1476-5640
- OpenAlex
- W1980486120
- Cited by
- 53
- References
- 22
- Citations by year
- 2025: 3 · 2024: 3 · 2023: 2 · 2022: 3 · 2021: 7 · 2020: 2 · 2019: 4 · 2018: 6 · 2017: 3 · 2016: 1 · 2015: 2 · 2013: 2 · 2012: 4
- FWCI
- 1.56
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- European Journal of Clinical Nutrition (publishedVersion)
- PubMed (publishedVersion)
- 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, total body water, fat-free mass, prediction equations, Sri Lankan children, South Asian populations, equation validation, isotope dilution
- MeSH terms
- Adipose Tissue, Adolescent, Algorithms, Body Composition, Body Height, Body Water, Body Weight, Child, Child, Preschool, Female, Humans, Male, Obesity, Predictive Value of Tests, Sensitivity and Specificity, Sri Lanka, Reproducibility of Results, Electric Impedance, Muscle, Skeletal, Body Fat Distribution
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