SHAPE-INVARIANT MODELING OF HUMAN GROWTH
SHAPE-INVARIANT MODELING OF HUMAN GROWTH
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DOI：
10.1080/03014468000004641
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发表时间：
1980-01-01
影响因子：
1.7
通讯作者：
HUBER, PJ
中科院分区：
文献类型：
--
作者：
STUTZLE, W;GASSER, T;HUBER, PJ
提出了一种新的模拟人体身高增长的方法，该方法也适用于其他变量。在一个数学算法中，一些关于这个增长过程的函数形式的猜测使用数据得到了持续的改进；所得到的形状不变模型（SIM）允许对1-20年的纵向数据进行近似无偏差的拟合，并为每个个体分配6个参数。SIM方法和使用速度而不是距离被证明适合用于生物数学建模来回答定性问题。通过对加性双组分SIM和青春期的出现抑制非青春期组分进一步生长的SIM（关闭模型）进行比较，后者在各方面都证明了优势。在青春期前和青春期期间，男孩和女孩的模型结构是一样的。在定性特征中发现了明显的中突，青春期开始前的下降，青春期高峰的不对称性是显著的。对个体参数的初步分析证实了先前通过其他方法发现的关于性别差异以及参数与成人身高之间关系的一些结果。
A new approach to modeling human height growth is presented which is also suitable for other variables. In a mathematical algorithm, some guess about the functional form of this growth process is improved consistently using the data; the resulting shape-invariant model (SIM) allows an approximately bias-free fitting for longitudinal data from 1-20 yr with 6 parameters assigned to each individual. The SIM approach and the use of velocities rather than distances proved to be suitable for biomathematical modeling to answer qualitative questions. In comparison of an additive 2-component SIM and one where the appearance of puberty inhibits further growth of the non-pubertal component (switch-off model), the latter proved to be superior in various aspects. The model structure turned out to be the same for boys and girls, both before and during puberty. Among the qualitative features found a pronounced midspurt, a dip before the onset of puberty, and the asymmetry of the pubertal peak are notable. A preliminary analysis of individual parameters confirmed some results found previously by other methods regarding sex differences and relations between parameters and with adult height.