TH (M) = (FH+MH+13)/2 +/- 8.5TH (F) = (FH+MH-13)/2 +/- 8.5
References:De Luca F et al. Endocrinologist. 1999 9:286.Falkner F, Tanner JM (eds). Human Growth, 3rd ed. New York: Plenum, 1986, pp. 104-9