The Cubic Functions for Spline Smoothed L, S and M Values for BMI Reference Data of Japanese Children

We have presented BMI reference data for Japanese children using the LSM method (1), where L, S and M values were smoothed by one or two segments of polynomial functions with nonsmooth connection, which was the barrier for adequate evaluation of BMI for children. So, we smoothed L, S and M values by cubic spline with several knots that are presented in this report.