PURPOSE: Whether the evaluation of body composition in obese people using low-cost, simple bedside, two-compartment techniques reflects the data obtained by indirect methods such as dual x-ray absorptiometry (DEXA) remains controversial. The aim of this study was to compare the data obtained by three methods of assessment of body composition (DEXA; bioelectrical impedance, BIA; and near infrared interactance, NII). METHOD: Data on body composition obtained in 53 obese women by these three methods were compared, using the Bland and Altman procedure to test the relative validity. RESULTS: Although the correlation coefficients between DEXA and the two other methods were high, there were some major differences (limits of agreement) between data concerning fat and lean mass. CONCLUSIONS: The present study indicates that these methods cannot be considered as interchangeable and raises some questions on the use of BIA and NII as a single method of evaluation of body composition in clinical research and practice in obese populations.
PURPOSE: Whether the evaluation of body composition in obesepeople using low-cost, simple bedside, two-compartment techniques reflects the data obtained by indirect methods such as dual x-ray absorptiometry (DEXA) remains controversial. The aim of this study was to compare the data obtained by three methods of assessment of body composition (DEXA; bioelectrical impedance, BIA; and near infrared interactance, NII). METHOD: Data on body composition obtained in 53 obesewomen by these three methods were compared, using the Bland and Altman procedure to test the relative validity. RESULTS: Although the correlation coefficients between DEXA and the two other methods were high, there were some major differences (limits of agreement) between data concerning fat and lean mass. CONCLUSIONS: The present study indicates that these methods cannot be considered as interchangeable and raises some questions on the use of BIA and NII as a single method of evaluation of body composition in clinical research and practice in obese populations.
Authors: Veronica P Alvarez; John B Dixon; Boyd J G Strauss; Cheryl P Laurie; Timothy B Chaston; Paul E O'Brien Journal: Obes Surg Date: 2007-02 Impact factor: 4.129
Authors: S Mahabir; S Ettinger; L Johnson; D J Baer; B A Clevidence; T J Hartman; P R Taylor Journal: Eur J Clin Nutr Date: 2007-04-25 Impact factor: 4.016
Authors: Somdat Mahabir; David Baer; Laura L Johnson; Mark Roth; William Campbell; Beverly Clevidence; Philip R Taylor Journal: Nutr J Date: 2007-01-17 Impact factor: 3.271