Body mass index as a measure of adiposity among children and adolescents: A validation study
Body mass index as a measure of adiposity among children and adolescents: A validation study
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DOI：
10.1016/s0022-3476(98)70433-0
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发表时间：
1998-02-01
影响因子：
5.1
通讯作者：
Heymsfield, SB
中科院分区：
文献类型：
--
作者：
Pietrobelli, A;Faith, MS;Heymsfield, SB
目的：为了验证在健康儿童人群中体重指数（BMI）（公斤每平方米）是一种有效的肥胖测量方法，与性别年龄无关。方法：采用双能x线吸收仪（DXA）对198名5至19岁的意大利健康儿童和青少年进行了体脂（TBF）（公斤）和体重脂肪百分比（PBF）的估计。我们建立了多元回归分析模型，以TBF和体脂百分比为因变量，BMI、年龄和相互作用项为自变量。分别对男孩和女孩进行了分析。结果：BMI与TBF（男孩和女孩分别为R-2 = 0.85和0.89）和PBF（男孩和女孩分别为R-2 = 0.63和0.69）密切相关。BMI-肥胖关联的置信限很宽，相似BMI的个体在TBF和PBF上表现出很大的差异。年龄是所有回归模型中显著的协变量。在男性和女性中，加入BMI的非线性项并没有显著增加TBF和PBF模型的R-2。结论：我们的结果支持在儿童和青少年群体中使用BMI作为肥胖测量指标，尽管在比较不同年龄群体的BMI或预测特定个体的TBF或PBF时应谨慎解释。
Objectives: To test the hypothesis that in a healthy pediatric population body mass index (BMI) (kilograms per meter square) is a valid measure of fatness that is independent of age for both sexes,Methods: Total body fat (TBF) (in kilograms) and percent of body weight as fat (PBF) were estimated by dual energy x-ray absorptiometry (DXA) in 198 healthy Italian children and adolescents between 5 and 19 years of age. We developed multiple regression analysis models with TBF and percent body fat as dependent variables and BMI, age, and interaction terms as independent variables. Separate analyses were conducted for boys and girls.Results: BMI was strongly associated with TBF (R-2 = 0.85 and 0.89 for boys and girls, respectively) and PBF (R-2 = 0.63 and 0.69 for boys and girls, respectively). Confidence limits an BMI-fatness association were wide, with individuals of similar BMI showing large differences in TBF and in PBF. Age was a significant covariate in all regression models. Addition of nonlinear terms for BMI did not substantially increase the R-2 for TBF and PBF models in Lays and girls.Conclusion: Our results support the use of BMI as a fatness measure in groups of children and adolescents, although interpretation should be cautious when comparing BMI across groups that differ in age or when predicting a specific individual's TBF or PBF.