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标题：Validity of Two Commercial Grade Bioelectrical Impedance Analyzers for Measurement of Body Fat Percentage
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作者：Brett A. Dolezal ; Brett A. Dolezal ; Michael J. Lau 等
期刊名称：Journal of exercise physiology online
印刷版ISSN：1097-9751
出版年度：2013
卷号：16
期号：4
页码：74-83
语种：English
出版社：American Society of Exercise Physiologists
摘要：Dolezal BA, Lau MJ, Abrazado M, Storer T, Cooper, CB. Validity of Two Commercial Grade Bioelectrical Impedance Analyzers for Measurement of Body Fat Percentage. JEPonline 2013;16(4):74-83. The purpose of this study was to validate the assessment of %Fat measured by two commercial grade BIA devices against the gold standard of dual x-ray absorptiometry (DEXA). Twenty-one subjects were measured for %Fat using three devices: an octopolar, multi-frequency BIA device (BIA8, BioSpace InBody R20); a quadripolar, single frequency BIA device (BIA4, Tanita BC-590BT); and a whole body DEXA (Hologic 4500). Mean ± SD differences in %Fat between the devices and DEXA were 0.14 ± 0.04 (P=0.80) (BIA8) and 1.77 ± 0.54 (P=0.76) (BIA4). Correlations with DEXA were r=0.98 (BIA8) and r=0.92 (BIA4). Bland-Altman analyses revealed a systematic bias for both BIA instruments vs. DEXA in which %Fat was underestimated in leaner subjects and overestimated in fatter subjects. All subjects had individual differences of ≤±3.0 %Fat for BIA8 vs. DEXA while 43% had differences of ≤3.0 %Fat for BIA4 vs. DEXA. Our data suggest that the use of an octopolar BIA device yields more than twice as many subjects within a ±3% error compared with BIA4; a value that might be considered appropriate for clinical use.
关键词：BIA;Body Composition;DEXA;Fat