The prediction of body fatness by BMI and skinfold thicknesses among children and adolescents
The prediction of body fatness by BMI and skinfold thicknesses among children and adolescents
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DOI：
10.1080/03014460601116860
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发表时间：
2007-01-01
影响因子：
1.7
通讯作者：
Horlick, Mary
中科院分区：
文献类型：
--
作者：
Freedman, David S.;Wang, Jack;Horlick, Mary
背景：虽然身体质量指数（BMI, kgm(-2)）被广泛用于衡量肥胖，但它是衡量超重，而不是身体脂肪过量。有人建议测量超重儿童的皮褶厚度，以确认是否存在过度肥胖。目的：本研究在健康的5- 18岁人群（n = 1196）中检测了皮肤褶厚度提供的身体肥胖的额外信息，而不是由年龄bmi传达的信息。方法和步骤：全身双能x线吸收仪（DXA）提供体脂%的估计值，两个皮褶（三头肌和肩胛下）的总和作为总皮褶厚度的指标。结果：通过多重R(2)s和各种回归模型的残差评估，与年龄bmi相比，皮褶总和的信息显著（p< 0.001）改善了对体脂的预测。例如，除了使用年龄bmi外，使用皮肤褶积总和将预测体脂%的倍数R(2)s从0.81增加到0.90（男孩），从0.82增加到0.89（女孩）。皮褶总和的使用也使体脂%的总体预测误差（残差的绝对值）降低了20-30%，但这些降低的幅度因bmi年龄的不同而有很大差异。在体重超重的儿童中，根据年龄bmi（>=第95百分位），皮褶总数仅将%体脂的预测误差降低了7-9%。结论：虽然将皮褶厚度与年龄bmi结合使用可以显著改善对身体肥胖的估计，但超重儿童的改善程度很小。
Background: Although the body mass index (BMI, kgm(-2)) is widely used as a measure of adiposity, it is a measure of excess weight, rather than excess body fat. It has been suggested that skinfold thicknesses be measured among overweight children to confirm the presence of excess adiposity.Objective: The present study examined the additional information provided by skinfold thicknesses on body fatness, beyond that conveyed by BMI-for-age, among healthy 5- to 18-years old (n = 1196).Methods and procedures: Total body dual-energy X-ray absorptiometry (DXA) provided estimates of % body fat, and the sum of two skinfolds (triceps and subscapular) was used as an indicator of the overall skinfold thickness.Results: As assessed by the multiple R(2)s and the residuals of various regression models, information on the skinfold sum significantly (p< 0.001) improved the prediction of body fatness beyond that obtained with BMI-for-age. For example, the use of the skinfold sum, in addition to BMI-for-age, increased the multiple R(2)s for predicting % body fat from 0.81 to 0.90 (boys), and from 0.82 to 0.89 (girls). The use of the skinfold sum also reduced the overall prediction errors ( absolute value of the residuals) for % body fat by 20-30%, but these reductions varied substantially by BMI-for-age. Among overweight children, defined by a BMI-for-age, >= 95th percentile, the skinfold sum reduced the predication errors for % body fat by only 7-9%.Conclusions: Although skinfold thicknesses, when used in addition to BMI-for-age, can substantially improve the estimation of body fatness, the improvement among overweight children is small.