A Study on the Equation Formulae for Estimation of Sitting Height from the Measurements of the Upper Extremity in the Korean Fetus.

The authors have measured the 2, 100 Korean fetuses ranging from 16 to 36 weeks in age to induce the equation formulae for the estimation of sitting height in terms of the measurements of the upper extremity and the following conclusions have been drawn. 1) The correlation coefficients of over O. 9 between the sitting height and the measurements of the upper extremity are indicative of highly correlated condition. 2) Differences of approximately 3 mm. in male and 5 mm. in female are manifested between actual and estimated .sitting heights, where the estimations are based on single measurement. 3) Differences of approximately 3 mm. in male and 5 mm. in female are manifested between actual and estimated sitting heights, where the estimations are based on double measurements. 4) The estimated sitting heights from single and double measurements are closer to actual one in same degree