Relationship between Growth of Height and Sitting-Height and Maturation of Adolescent Girls, and the Analysis of Its Regional Difference

Abstract

Data about menarcheal ages and measurements of height and sitting-height for the last 3 years of 22, 448 girls from 11 to 16 years old wer investigated from the standpoint that the percentage of maturated girls would variate by chronological age and by growth of height or sitting-height.
The main findings are as follows:
1. Regional difference in menarcheal age was found to originate in the state of constitutional growth.
2. No significant difference in coefficient of variation was observed between height and sitting-height at menarcheal period.
3. A short terminative maturation of about 1.4 years or more was observed in extremely tall girls at the earlier period and in extremely short girls at the later period, while it took 4 years or more for the girls of average height or sitting-height to complete maturation.
4. The state of maturity for, all adolescent girls and also the menarcheal age for premenarcheal girls may be presumed by means of the curves, which represent the percentages of postmenarcheal girls by chronological age and by height (or sittingheight).