Body mass prediction from the skeleton most commonly employs femoral head diameter (FHD). However, theoretical predictions and empirical data suggest the relationship between mass and FHD is strongest in young adults, that bone dimensions reflect lean mass better than body or fat mass and that other femoral measurements may be superior. Here, we generate prediction equations for body mass and its components using femoral head, neck and proximal shaft diameters and body composition data derived from dual-energy x-ray absorptiometry (DXA) scans of young adults (n = 155, 77 females and 78 males, mean age 22.7 ± 1.3 years) from the Andhra Pradesh Children and Parents Study, Hyderabad, India. Sex-specific regression of log-transformed data on femoral measurements predicted lean mass with smaller standard errors of estimate (SEEs) than body mass (12–14% and 16–17% respectively), while none of the femoral measurements were significant predictors of fat mass. Subtrochanteric mediolateral shaft diameter gave lower SEEs for lean mass in both sexes and for body mass in males than FHD, while FHD was a better predictor of body mass in women. Our results provide further evidence that lean mass is more closely related to proximal femur dimensions than body or fat mass and that proximal shaft diameter is a better predictor than FHD of lean but not always body mass. The mechanisms underlying these relationships have implications for selecting the most appropriate measurement and reference sample for estimating body or lean mass, which also depend on the question under investigation.

中文翻译：

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使用双能X线吸收法从股骨近端尺寸估算体重和成分。

从骨骼进行体重预测最常用的是股骨头直径（FHD）。但是，理论预测和经验数据表明，质量和FHD之间的关系在年轻人中最强，骨骼尺寸比体重或脂肪质量更好地反映了瘦体重，而其他股骨测量结果可能更好。在这里，我们使用股骨头，颈部和近端干径以及年轻人的双能X射线骨密度仪（DXA）扫描得出的身体成分数据生成体重及其成分的预测方程（n =印度海得拉巴的安得拉邦儿童与父母研究中心的155位女性，77位女性和78位男性，平均年龄22.7±1.3岁。股骨测量值对数转换数据的性别特异性回归预测瘦体重，其标准估计误差（SEE）比体重小（分别为12–14％和16–17％），而所有股骨测量值都不是体重的重要预测指标脂肪量。股骨转子下中外侧干径的男性和女性的瘦体重均低于FHD，而FHD则更能预测女性的体重。我们的结果提供了进一步的证据，表明瘦体重与股骨近端的尺寸比体重或脂肪更紧密相关，并且近端干径比瘦肉的FHD更好，但并非总是如此。