Height and adiposity among children
Height and adiposity among children
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DOI：
10.1038/oby.2004.102
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发表时间：
2004-05-01
期刊：
影响因子：
--
通讯作者：
Horlick, M
中科院分区：
文献类型：
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作者：
Freedman, DS;Thornton, JC;Horlick, M
目的：虽然BMI（每平方米公斤数）被广泛用作肥胖的替代指标，但它与儿童身高有中等相关性（r近似于0.3）。我们研究了基于体重指数大于或等于第95个百分位而将高个子儿童优先分类为超重是否合适。研究方法和程序：我们评估了5- 18岁受试者（n = 1180）的身高与BMI水平、10个皮褶厚度之和以及由DXA测定的体脂百分比的横断面关系。结果：5- 11岁年龄相对较高的受试者BMI水平大于或等于第95个百分位数的患病率明显高于较矮的儿童。例如，在5- 8岁的男孩中，身高年龄比每增加一个标准差，超重发生率就增加4.6倍（p < 0.001）。身高不仅与身体质量指数相关，而且与皮肤褶数和体脂率也有类似的相关性；此外，这些关联的程度随着年龄的增长而下降。我们还发现，体脂百分比与BMI之间的相关性（r = 0.85至0.90）接近任何体重-身高指数所能达到的最大相关性。讨论：使用体重指数（BMI）是合适的，因为身高和肥胖在12岁之前是相关的。体重指数优先将较高的幼儿归类为超重。
Objective: Although BMI (kilograms per meter squared) is widely used as a surrogate measure of adiposity, it is moderately associated (r similar to 0.3) with height among children. We examined whether the resulting preferential classification of taller children as overweight, based on a BMI greater than or equal to95th percentile, is appropriate.Research Methods and Procedures: We assessed the cross-sectional relation of height among 5- to 18-year-old subjects (n = 1180) to levels of BMI, the sum of 10 skinfold thicknesses, and percentage body fat as determined by DXA.Results: The prevalence of a BMI level greater than or equal to95th percentile was substantially higher among 5- to 11-year-old subjects who were relatively tall for their age than among shorter children. Among 5- to 8-year-old boys, for example, each SD increase in height-for-age was associated with a 4.6-fold increase in the prevalence of overweight (p < 0.001). Height not only was associated with BMI but also showed similar correlations with the skinfold sum and with percentage body fat; furthermore, the magnitudes of these associations decreased with age. We also found that the association between percentage body fat and BMI (r = 0.85 to 0.90) was close to the maximum correlation that can be achieved by any weight-height index.Discussion: The use of BMI, which preferentially classifies taller young children as overweight, is appropriate because height and adiposity are correlated before the age of 12 years.