PMID: 2097881Dec 1, 1990Paper

Smoothed skeletal maturity curve of Japanese children by Tanner-Whitehouse 2 (TW2) method and its application

Kaibogaku zasshi. Journal of anatomy
S Takai

Abstract

This paper reports the TW2 skeletal maturity status on some 8,800 Ogi schoolchildren aged 6.5-17.5 years, who participated in the 1979-1988 Ogi Longitudinal Growth Study. The smoothing B-spline function was applied to 3, 10, 25, 50, 75, 90, and 97 percentile TW2 RUS, carpal and 20-bone scores. The carpal maturity pattern was variable throughout the periods. The RUS matured with narrower variation during preadolescent period, then became variable with advancing age. The dispersion of the 20-bone score converged toward post-adolescent period. Ogi children showed retarded skeletal maturation compared with British standard during preadolescent period, then the children have surpassed the standard at adolescence. The skeletal maturity status of Ogi children was not identical with that of two Chinese samples. Harbin and Beijing children. Ogi girls showed similar maturity pattern to Harbin girls, but Ogi boys retarded in the RUS score compared with Harbin boys during preadolescent period. Ogi girls retarded in the TW2 20-bone bone age at ages 7-9 years, then they surpassed Beijing girls. Ogi boys always exceeded Beijing boys during the period of 7-17 years. Tokyo children in 1960s surpassed the Ogi children during whole periods studie...Continue Reading

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