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Document Type

Article

Abstract

Growth and sexual development of 119 normal girls aged 8.5 to 13.4 years were followed for 7 years at 6-month intervals until adult height was reached. The percentage of adult height attained and its variations at onset of secondary sexual characteristics and at 6-month intervals of chronological age as well as at skeletal age was calculated. The correlation and regression studies showed that the percentage of adult height attained is dependent on age of onset of sexual development as well as the rate of skeletal development, i.e., those who attain a maturity index early, have reached smaller percentages of adult height. The standard deviations of attained percentage of adult height in relation to age of onset of secondary sexual characteristics were much smaller compared to those based on chronological age and at about the same level as those based on skeletal age. The comparison of the standard errors of methods based on the onset of secondary sexual characters, skeletal age and chronological age showed that the adult height of these girls could be estimated from the height attained at onset of secondary sexual characteristics with an error which is much smaller than that based on height at chronological age and about equal to that based on skeletal age.

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