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Exerc Sci > Volume 13(2); 2004 > Article
Exercise Science 2004;13(2): 263-272.
단주파수 및 다주파수 생체전기저항법에 의한 고령자의 신체구성평가
Analysis of body composition by multiple and single frequency method in the elderly
Analysis of body composition by multiple and single frequency method in the elderly. Exercise Science, 13(2): 263-272, 2004. The purpose of this study was to compare estimates of body composition determined from single-frequency bioelectrical impedance methods (S-BI) and multi-frequency bioelectrical impedance method (M-BI). The body composition was assessed by dual energy X-ray absor- ptiometry (DXA), 4 brands of S-BI (TBF-300, GIF-891DX, HBF-300, HTM-1000) and 1 brand of M-BI (InBody 3.0). Sixty eighty elderly, aged 62-80 years, served as subjects. The S-BI and M-BI FFM estimates were highly correlated with the FFM measured by DXA (FFMDXA) (r=0.89-0.91) as criterion method. The standard errors of estimate (SEE) for FFM were 2.1-2.88 kg. With the exception of the TBF-300 and HK, all brands of BI slightly overestimated or overestimated FFM. The absolute mean differences between FFMDXA and each of the 5 BI estimates ranged from -1.3 kg to +1.1 kg. Although the 5 brands of BI provided slightly different estimates, the results of this study suggest that S-BI and M-BI are relatively valid in assessment of body composition in Korean elderly.
Key words: single-frequency bioelectrical impedance, multi-frequency bioelectrical impedance, dual-energy X-ray absorptiometry, fat-free mass, elderly
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