Comparison of the Cutoff Value for Judging Obesity by Three Different Measuring Methods(Underwater Weighing, Skinfold Thickness and Bioelectrical Impedance Analysis) to Estimate the Body Composition.

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  • 日本人若年女性における身体組成推定の異なる３法（水中体重秤量法，皮脂厚法及び生体インピーダンス法）より求めた肥満判定基準値の検討
  • ニホンジン ジャクネン ジョセイ ニ オケル シンタイ ソセイ スイテイ ノ コトナル 3ホウ スイチュウ タイジュウ ヒョウリョウホウ ヒシコウホウ オヨビ セイタイ インピーダンスホウ ヨリ モトメタ ヒマン ハンテイ キジュンチ ノ ケントウ

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Abstract

We compared three different measuring methods for evaluating the percentage of bodyfat (BF%), underwater weighing (UWW), skinfold thickness (SFT) and bioelectrical impedance analysis (BIA). The study subjects were 249 healthy young Japanese women aged 19-21 years. The mean BF% values by SFT were significantly lower than those by the other methods (p<0.05). The number of subjects judged as obese were 50, 30 and 48 from the criterion of a BF% value equal to or greater than 30% by UWW, SFT and BIA, respectively. We also analyzed the frequency of obesity by the chi-square test. These results suggest that a common cutoff value of 30% for judging obesity would result in a different evaluation by SFT. The numbers of obese subjects for whom the UWW evaluation agreed with that by SFT and BIA were 19 and 26, respectively. We propose that the cutoff value for judging obesity should be considered according to the measuring method.

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