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Body composition assessment in overweight women: validation of air displacement plethysmography
Author(s) -
Wingfield Hailee L.,
SmithRyan Abbie E.,
Woessner Mary N.,
Melvin Malia N.,
Fultz Sarah N.,
Graff Rachel M.
Publication year - 2014
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1111/cpf.12067
Subject(s) - medicine , overweight , intraclass correlation , lean body mass , fat mass , nuclear medicine , plethysmograph , obesity , body adiposity index , dual energy x ray absorptiometry , body fat percentage , zoology , body weight , classification of obesity , bone mineral , clinical psychology , osteoporosis , biology , psychometrics
Summary Purpose 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 m 2 ). Subjects/Methods 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 m 2 ) 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. Results 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). Conclusions 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.