油症患者における体脂肪率推定式の作成と半減期の再検証

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  • Estimation Formula of Body Fat Ratio and Revalidation of the Half-Lives of Dioxin-Like-Compounds in the Blood of Yusho Patients
  • ユショウ カンジャ ニ オケル タイシボウリツ スイテイシキ ノ サクセイ ト ハンゲンキ ノ サイケンショウ

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Since dioxins are fat-soluble, the total amount of dioxins in the body is estimated by multiplying the concentration per lipid by the amount of body fat. The formula commonly used to estimate body fat mass was created nearly 30 years ago. Late-stage elderly patients, such as patients with oil disease, were not included in the development of this formula. In this study, we created a formula to estimate body fat percentage based on the measured value of body fat percentage in the Yusho annual check-ups. Body fat percentage increased in women until their late 60s and in men until their mid-70s, but then tended to decrease. Using this formula for estimating body fat percentage, we verified two studies with half-lives published so far. The first study reported the existence of a group of approximately 10 years reported so far and a group of infinite half-lives with almost no emission. The second study was conducted in the same way as the first study, at a different time, but the number of people in the group of about 10 years decreased and the number of people in the group with infinite half-life increased. When that was done in the study using the new formula for estimating the body fat percentage, the same conclusion was obtained, although there were some differences.

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