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Original Papers

Assessment of adiposity by bio impedance analysis: developing a population specific equation for Sri Lankan adolescents

Authors:

Maduka de Lanerolle-Dias ,

Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, LK
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Pulani Lanerolle,

Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, LK
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Angela de Silva,

Department of Physiology, Faculty of Medicine, University of Colombo, LK
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Sunethra Atukorala

Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, LK
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Abstract

Objective: Adiposity in adolescence is associated with chronic disease in adulthood, and assessment of body fat mass is vital for screening at risk populations. Adiposity is measured in many ways including bio impedence analysis. The objective of this study was to validate existing bio impedance analysis (BIA) equations on 15-19 year old adolescent girls and to derive a population specific equation for the prediction of percentage fat mass (%FM) for adolescent girls.

Methods: Body composition of 15 - 19 year old, adolescent girls was assessed by the deuterium dilution method and BIA. Validity of existing equations for the prediction of %FM of Sri Lankan adolescent girls were assessed prior to the derivation and validation of a new %FM equation. The new equation was derived using linear regression analysis against the reference method, deuterium dilution.

Results: Existing BIA equations significantly (p< 0.001) overestimated %FM. The new equation derived for the prediction of %FM of Sri Lankan adolescent girls significantly correlated with the reference method. There was no significant difference in %FM obtained by the reference method (%FM: 24.67 ± 9.2) and the derived equation (%FM: 24.9 ± 6.3).

Conclusions: The new equation; %FM = -74.065 + 0.671 (height2 / resistance) + 0.049 (resistance) + 2.080 (BMI), is appropriate for the prediction of %FM in Sri Lankan post pubertal adolescent girls, and may be validated for use on other South Asian populations.

DOI: http://dx.doi.org/10.4038/sjdem.v2i1.4323

Sri Lanka Journal of Diabetes, Endocrinology and Metabolism 2012; 2: 3-10

How to Cite: de Lanerolle-Dias, M. et al., (2012). Assessment of adiposity by bio impedance analysis: developing a population specific equation for Sri Lankan adolescents. Sri Lanka Journal of Diabetes Endocrinology and Metabolism. 2(1), pp.3–10. DOI: http://doi.org/10.4038/sjdem.v2i1.4323
Published on 17 May 2012.
Peer Reviewed

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