Abstract
Abstract: Over the years bioelectrical impedance assay (BIA) has gained popularity in the assessment of body composition. However, equations for the prediction of whole body composition use whole body BIA. This study attempts to evaluate the usefulness of segmental BIA in the assessment of whole body composition. A cross sectional descriptive study was conducted at the Professorial Paediatric Unit of Lady Ridgeway Hospital, Colombo, involving 259 (M/F:144/115) 5 to 15 year old healthy children. The height, weight, total and segmental BIA were measured and impedance indices and specific resistivity for the whole body and segments were calculated. Segmental BIA indices showed a significant association with whole body composition measures assessed by total body water (TBW) using the isotope dilution method (D2O). Impedance index was better related to TBW and fat free mass (FFM), while specific resistivity was better related to the fat mass of the body. Regression equations with different combinations of variables showed high predictability of whole body composition. Results of this study showed that segmental BIA can be used as an alternative approach to predict the whole body composition in Sri Lankan children. Doi: http://dx.doi.org/10.4038/jnsfsr.v40i3.4697 J.Natn.Sci.Foundation Sri Lanka 2012 40 (3):231-239
Highlights
A change occurring in disease and the response to treatment was assessed by anthropometry
Segmental bioelectrical impedance assessment (BIA) indices showed a significant association with whole body composition measures assessed by total body water (TBW) using the isotope dilution method (D2O)
Impedance index was better related to TBW and fat free mass (FFM), while specific resistivity was better related to the fat mass of the body
Summary
A change occurring in disease and the response to treatment was assessed by anthropometry. Advances in knowledge regarding the changes that occur in body and the availability of advanced assessment techniques, have enabled physicians to look deeper into specific changes that occur due to disease. The available sophisticated techniques give accurate results, most need expensive equipment and trained personnel with the cooperation from the patients. These were significant drawbacks in the assessment of human body composition. Considration of the bioelectrical impedance assessment (BIA) was an answer to this problem to an extent, where, the technique was simple and nonthreatening to children, cost effective and portable. The BIA equipment is simple to handle and requires minimum training and could be operated at bed side. The technique has gained popularity and has more extensive usage, especially in adults
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