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Assessment of body composition in Sri Lankan children: validation of a bioelectrical impedance prediction equation.
Eur J Clin Nutr. 2008 Oct; 62(10):1170-7.EJ

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.

Authors+Show Affiliations

Department of Paediatrics, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

17700653

Citation

Wickramasinghe, V P., et al. "Assessment of Body Composition in Sri Lankan Children: Validation of a Bioelectrical Impedance Prediction Equation." European Journal of Clinical Nutrition, vol. 62, no. 10, 2008, pp. 1170-7.
Wickramasinghe VP, Lamabadusuriya SP, Cleghorn GJ, et al. Assessment of body composition in Sri Lankan children: validation of a bioelectrical impedance prediction equation. Eur J Clin Nutr. 2008;62(10):1170-7.
Wickramasinghe, V. P., Lamabadusuriya, S. P., Cleghorn, G. J., & Davies, P. S. (2008). Assessment of body composition in Sri Lankan children: validation of a bioelectrical impedance prediction equation. European Journal of Clinical Nutrition, 62(10), 1170-7.
Wickramasinghe VP, et al. Assessment of Body Composition in Sri Lankan Children: Validation of a Bioelectrical Impedance Prediction Equation. Eur J Clin Nutr. 2008;62(10):1170-7. PubMed PMID: 17700653.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Assessment of body composition in Sri Lankan children: validation of a bioelectrical impedance prediction equation. AU - Wickramasinghe,V P, AU - Lamabadusuriya,S P, AU - Cleghorn,G J, AU - Davies,P S W, Y1 - 2007/08/15/ PY - 2007/8/19/pubmed PY - 2009/1/13/medline PY - 2007/8/19/entrez SP - 1170 EP - 7 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 62 IS - 10 N2 - 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. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/17700653/Assessment_of_body_composition_in_Sri_Lankan_children:_validation_of_a_bioelectrical_impedance_prediction_equation_ L2 - https://doi.org/10.1038/sj.ejcn.1602835 DB - PRIME DP - Unbound Medicine ER -