Predictive accuracy of bioelectrical impedance and anthropometry methods in estimating body composition in elderly

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Exerc Sci > Volume 14(3); 2005 > Article

Exercise Science 2005;14(3): 241-250.

생체전기저항법과 인체측정법에 의한 신체구성 평가의 비교 -고령자를 중심으로-

김현수¹, 이경진²

¹서울과학기술대학교
²고려대학교

Predictive accuracy of bioelectrical impedance and anthropometry methods in estimating body composition in elderly

ABSTRACT

Kim, H.S., Lee, K.J. Predictive accuracy of bioelectrical impedance and anthropometry methods in estimating body composition in elderly. Exercise Science, 14(3): 241-250, 2005. Bioimpedance (BI) and anthropometry (ANT) methods for assessing body composition have been used. The purpose of this investigation was to compare estimates of human body composition determined from foot-pad style BI and ANT methods. The human body composition was assessed by dual energy X-ray absorptiometry (DXA), BI method and ANT equation (svendsen, 1993). Twenty three men and 24 women, aged 60-82 years, served as subjects. The mean (SD) percentage of body fat (%BF) assessed by DXA, BI, and ANT methods were 28.4 (8.6)%, 28.1 (8.2)% and 25.7 (8.1)%, respectively. There were high validity coefficients (r=.91 and .95, for BI and ANT, respectively) with the %BF measured by DXA. However, compared to the criterion measures of %BF (DXA), the magnitude of agreement in the BI and ANT revealed a different pattern. The mean absolute difference between DXA and BI measurements was -0.5 (2.8) %BF and, between DXA and ANT it was 1.6 (2.5) %BF. Compared to the DXA method, the STF method was as much as a 9.5% underestimation of %BF. The results suggest that although the ANT provided high correlation with criterion value, use of the ANT may not suitable for assessing the %BF of the elderly in Korea.

Key words: Body composition, Dual energy X-ray absorptiometry, Anthropometry, Bioelectrical impedance, elderly