Gerver W J, vd Laan C G, Drayer N M, Schaafsma W
Int J Biomed Comput. 1985 Jan;16(1):29-34. doi: 10.1016/0020-7101(85)90043-1.
Constructing reference values for measurements of children, e.g. the mean height as function of age, one needs a smoothing technique. Various techniques will be discussed and applied to a particular study of anthropometric growth. The overall conclusion is that reliable curves can be obtained by using computer programs based on approximations by cubic splines, and by using the eye for choosing from the corresponding outputs.
