Universal equation for estimating ideal body weight and body weight at any BMI
Universal equation for estimating ideal body weight and body weight at any BMI
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DOI：
10.3945/ajcn.115.121178
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发表时间：
2016-05-01
影响因子：
7.1
通讯作者：
Heymsfield, Steven B.
中科院分区：
文献类型：
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作者：
Peterson, Courtney M.;Thomas, Diana M.;Heymsfield, Steven B.
背景：理想体重(IBW)方程和体重指数(BMI)范围都被用来描绘健康或正常体重范围，尽管这两种不同的方法彼此不同。特别是，过去的IBW方程与BMI值不一致，而且与BMI不同的是，这些方程未能识别出理想体重或目标体重的范围。目的：据我们所知，我们第一次将线性IBW方程的概念与根据BMI定义目标体重的概念结合起来。设计：通过使用微积分和近似，我们推导出了一个易于使用的线性方程，临床医生可以使用它来计算任意目标BMI值下的IBW和体重。我们利用NHANES数据测量了方程的经验精度，并与过去的IBW方程进行了比较分析。结果：我们的线性方程允许我们根据NHANES数据计算任何BMI和身高的体重，平均经验精度为0.5%-0.7%。此外，我们发现我们的体重方程与男性和女性的BMI值直接一致，这避免了过去困扰IBW方程的身高谱上、下端的高估和低估问题。结论：我们的线性方程通过将其替换为单一的通用方程，从而增加了IBW方程的复杂性，该方程可以同时计算任何目标BMI和身高下的IBW和体重。因此，我们的公式与BMI兼容，可以使用心算或计算器应用，而不需要应用程序，这使其成为健康从业者和普通公众的有用工具。
Background: Ideal body weight (IBW) equations and body mass index (BMI) ranges have both been used to delineate healthy or normal weight ranges, although these 2 different approaches are at odds with each other. In particular, past IBW equations are misaligned with BMI values, and unlike BMI, the equations have failed to recognize that there is a range of ideal or target body weights.Objective: For the first time, to our knowledge, we merged the concepts of a linear IBW equation and of defining target body weights in terms of BMI.Design: With the use of calculus and approximations, we derived an easy-to-use linear equation that clinicians can use to calculate both IBW and body weight at any target BMI value. We measured the empirical accuracy of the equation with the use of NHANES data and performed a comparative analysis with past IBW equations.Results: Our linear equation allowed us to calculate body weights for any BMI and height with a mean empirical accuracy of 0.5-0.7% on the basis of NHANES data. Moreover, we showed that our body weight equation directly aligns with BMI values for both men and women, which avoids the overestimation and underestimation problems at the upper and lower ends of the height spectrum that have plagued past IBW equations.Conclusions: Our linear equation increases the sophistication of IBW equations by replacing them with a single universal equation that calculates both IBW and body weight at any target BMI and height. Therefore, our equation is compatible with BMI and can be applied with the use of mental math or a calculator without the need for an app, which makes it a useful tool for both health practitioners and the general public.