Body composition assessment in overweight women: validation of air displacement plethysmography
Version of Record online: 15 JUL 2013
© 2013 Scandinavian Society of Clinical Physiology and Nuclear Medicine. Published by John Wiley & Sons Ltd
Clinical Physiology and Functional Imaging
Volume 34, Issue 1, pages 72–76, January 2014
How to Cite
Wingfield, H. L., Smith-Ryan, A. E., Woessner, M. N., Melvin, M. N., Fultz, S. N. and Graff, R. M. (2014), Body composition assessment in overweight women: validation of air displacement plethysmography. Clinical Physiology and Functional Imaging, 34: 72–76. doi: 10.1111/cpf.12067
- Issue online: 4 DEC 2013
- Version of Record online: 15 JUL 2013
- Manuscript Accepted: 24 JUN 2013
- Manuscript Received: 15 APR 2013
- Nutrition Obesity Research Center. Grant Number: P30DK056350
- dual energy x-ray absorptiometry;
- fat-free mass;
- percent body fat;
The purpose of this study was to evaluate the validity and reliability of air displacement plethysmography (ADP) compared to a dual energy x-ray absorptiometry (DXA) criterion for body composition measurement in overweight and obese women (BMI ≥ 25·0 kg m2).
Twenty-four overweight and obese women (Mean ± SD; Age: 36·6 ± 12·0 years; Height: 166·4 ± 5·8 cm; Weight: 86·5 ± 14·2 kg; Body Fat: 38·5 ± 3·7%; BMI: 31·3 ± 5·5 kg m2) were tested after an 8-h fast. Fat mass (FM), fat-free mass (FFM) and percent body fat (%BF) were measured by ADP and compared to values determined by the DXA criterion. FFM from DXA was calculated as lean mass plus bone mineral content. A paired samples t-test was used to test for significant differences in the body composition variables between methods. A one-way ANOVA along with intraclass correlation coefficient (ICC), SEM,%SEM and MD was used to represent reliability.
Validity data comparing ADP and DXA demonstrated no significant difference in FM (ADP-DXA FM = 0·99 kg; P = 0·113), FFM (0·98 kg; P = 0·115) and %BF (1·56%; P = 0·540). Reliability data for ADP between the first and second trials showed no significant difference in FM (P = 0·168; ICC = 0·994; SEM = 0·668), FFM (P = 0·058; ICC = 0·973; SEM = 0·892) or %BF (P = 0·121; ICC = 0·971; SEM = 0·813).
For overweight and obese women, ADP was found to be a valid measure of FM, FFM and %BF when compared with DXA. The reliability of ADP was supported for all body composition variables.