基于人体生长实验模型的人体体型指数。
Human body shape index based on an experimentally derived model of human growth.
作者信息
Lebiedowska Maria K, Alter Katharine E, Stanhope Steven J
机构信息
Physical Disabilities Branch, National Institutes of Health, Bethesda, MD, USA.
出版信息
J Pediatr. 2008 Jan;152(1):45-9, 49.e1-2. doi: 10.1016/j.jpeds.2007.05.046. Epub 2007 Oct 24.
OBJECTIVES
To test the assumption of geometrically similar growth by developing experimentally derived models of human body growth during the age interval of 5 to 18 years; to use these derived growth models to establish a new human body shape index (HBSI) based on natural age-related changes in human body shape (HBS); and to compare various metrics of relative body weight (body mass index [BMI], ponderal index [PI], and HBSI) in a sample of 5- to 18-year-old children.
STUDY DESIGN
Nondisabled Polish children (n = 847) participated in this descriptive study. To model growth, the best fit between body height (H) and body mass (M) was calculated for each sex using the allometric equation M = m(i) H(chi). HBSI was calculated separately for girls and boys, using sex-specific values for chi and a general HBSI from combined data. The customary BMI and PI were calculated and compared with HBSI values.
RESULTS
The models of growth were M = 13.11H(2.84) (R2 = 0.90) for girls and M = 13.64H(2.68) (R2 = 0.91) for boys. HBSI values contained less inherent variability and were less influenced by growth (age and height) compared with BMI and PI.
CONCLUSIONS
Age-related growth during childhood is sex-specific and not geometrically similar. Therefore, indices of HBS formulated from experimentally derived models of human growth are superior to customary geometric similarity-based indices for characterizing HBS in children during the formative growth years.
目的
通过建立5至18岁年龄段人体生长的实验衍生模型，来检验几何相似生长的假设；使用这些衍生的生长模型，基于人体形状（HBS）与年龄相关的自然变化，建立一个新的人体形状指数（HBSI）；并在5至18岁儿童样本中比较相对体重的各种指标（体重指数[BMI]、 ponderal指数[PI]和HBSI）。
研究设计
无残疾的波兰儿童（n = 847）参与了这项描述性研究。为了模拟生长，使用异速生长方程M = m(i)H(chi)为每个性别计算身高（H）和体重（M）之间的最佳拟合。使用特定性别的chi值和合并数据的一般HBSI，分别为女孩和男孩计算HBSI。计算了常规的BMI和PI，并与HBSI值进行比较。
结果
女孩的生长模型为M = 13.11H(2.84)（R2 = 0.90），男孩的生长模型为M = 13.64H(2.68)（R2 = 0.91）。与BMI和PI相比，HBSI值的内在变异性较小，受生长（年龄和身高）的影响也较小。
结论
儿童期与年龄相关的生长具有性别特异性，并非几何相似。因此，从人体生长的实验衍生模型制定的HBS指数，在表征儿童成长发育阶段的HBS方面，优于基于常规几何相似性的指数。
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