ABSTRACT
A study was conducted to analyze the height growth velocity curve based upon the maturity rate. Ninety-eight longitudinal data points for height (for subjects aged 6 to 17 years) were obtained retrospectively from health examination records in 1983. Growth distance and growth velocity curves of each individual were described by the wavelet interpolation method, and PHV age was determined with the described graph using computer simulation. We classified the growth velocity curve by the maturity rate approximated according to the PHV age. As a result, it was shown that the after-growth spurt in early maturity and somewhat early maturity type appeared more than in the average and somewhat late maturity types, and that conversely, the mid-growth spurt in the late maturity and somewhat late maturity types appeared more than in the early maturity and somewhat early maturity types. Specifically, it was demonstrated that two mid-growth spurts appeared in the late maturity and somewhat late maturity types.