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KMID : 0388120020110040389
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Journal of Korean Society for the Study of Obesity
2002 Volume.11 No. 4 p.389 ~ p.397
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Reliability and Validity of Bioimpedance Body Composition Analyzer
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Kim Hyun-Soo
Park Hye-Soon
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Abstract
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Background : The aims of this study was to assess the reliability and validity of recently developed new hand-foot segmental bioelectrical impedance body composition analyzer in determination of the % body fat (%BF) and fat-free mass (FFM) among Korean adults.
Methods : The study subjects were all volunteers composed by 35 males and 22 females. The % BFuw measured by underwater weighing technique (UW) was the reference values. The %BFHK estimates obtained from bioelectrical impedance body composition analyzer (Healthkeeper, HK). Gender-specific equations were cross-validated. Means (M), standard deviations (SD), correlation coefficients (r), standard errors of estimate (SEE) and total errors (TE) were compared to the criterion test of underwater weighing (%BFUW) at residual lung volume.
Results : There were high correlation coefficients as r_y.y=.89 and .80 for men and women, respectively, the prediction errors were moderate as SEE=2.5% and TE=2.9% for men, SEE=2.8%, and TE=2.3% for women, respectively. The difference between the average %BFUW and %BFHK were small for men (0.7%) and women (0.9%). For both gender, the lines of identity did not differ significantly (p>0.5) from the lines of best fit.
Conclusion : Use of the Healthkeeper body composition analyzer is suitable for the assessing the % body fat (%BF) and fat-free mass (FFM) among Korean adults with normal range of percentage body fat.
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KEYWORD
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Reliability, Validity, Bioimpedance, Body fat, Fat-free mass
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