Wingfield Hailee L, Smith-Ryan Abbie E, Woessner Mary N, Melvin Malia N, Fultz Sarah N, Graff Rachel M
Department of Exercise and Sport Science, Applied Physiology Laboratory, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA.
Clin Physiol Funct Imaging. 2014 Jan;34(1):72-6. doi: 10.1111/cpf.12067. Epub 2013 Jul 15.
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.
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.
本研究旨在评估与双能X线吸收法（DXA）标准相比，空气置换体积描记法（ADP）在超重和肥胖女性（BMI≥25.0kg/m²）身体成分测量中的有效性和可靠性。
对象/方法：24名超重和肥胖女性（均值±标准差；年龄：36.6±12.0岁；身高：166.4±5.8cm；体重：86.5±14.2kg；体脂：38.5±3.7%；BMI：31.3±5.5kg/m²）在禁食8小时后接受测试。通过ADP测量脂肪量（FM）、去脂体重（FFM）和体脂百分比（%BF），并与DXA标准测定的值进行比较。DXA的FFM计算为瘦体重加骨矿物质含量。采用配对样本t检验来检验两种方法在身体成分变量上的显著差异。使用单向方差分析以及组内相关系数（ICC）、标准误（SEM）、%SEM和平均差（MD）来表示可靠性。
比较ADP和DXA的有效性数据显示，FM（ADP - DXA FM = 0.99kg；P = 0.113）、FFM（0.98kg；P = 0.115）和%BF（1.56%；P = 0.540）无显著差异。ADP在第一次和第二次试验之间的可靠性数据显示，FM（P = 0.168；ICC = 0.994；SEM = 0.668）、FFM（P = 0.058；ICC = 0.973；SEM = 0.892）或%BF（P = 0.121；ICC = 0.971；SEM = 0.813）无显著差异。
对于超重和肥胖女性，与DXA相比，ADP被发现是FM、FFM和%BF的有效测量方法。ADP在所有身体成分变量上的可靠性得到了支持。
