日本人成年婦女子の足長と身長との関係

Correlations between footlength and stature are studied by 382 Japanese adult females in Tiba and Tokyo districts. Footlengths are measured from heel to the top of Ist, 2 nd and 3 rd toes, and called footlength I, II, and III respectively. Results are shown in Tables 1-4 and Fig, 1-5. Our conclusions are as follows.<BR>I. On the side difference of footlength.<BR>a) The right foot is, on the average, longer than the left by 0.8mm on the footlength I, 0.3mm on the II and III.<BR>b) In about 30% of all cases the left is found longer than the right. No side difference is proved in about 30% of cases.<BR>c) In about 12% of all cases the II was the longest. No cases was observed in which the III was longest. In about 15% the I and II showed equal length. In over 70% of all cases the longest was the I. The meanvalues of the footlengths are 21.9cm by the I, 21.6 cm by the II and 20.9cm by the III.<BR>II. Relation between stature and footlength.<BR>a) On the relation between stature and footlength shows a fairly high positive correlation. (correlations coefficient is about 0.7) and regressions coefficients are 0.136 on the I, 0.132 on the II and 0.121 on the III, and σyx are small.<BR>b) Correlation between stature and enlarge rate of the footlength (stature/footlength= reciprocal of relative footlength) is very low.<BR>c) As regressions coefficients of footlengths (α_y) to stature we got 0.136, 0.132 and 0.121 for footlength I, II and HI respectively. And as those of stature t foot lengths (α_x) we got 3.592, 3.629 and 3.645. From theoretical point of view, α_y and α_x are to stand in reciprocal relation and satisfy next expression. α_y α_x =1<BR>Our results do not satisfy above expression, simply because the subjects of our study are biological materials having much deviations.<BR>d) Relation of enlarge rate of footlength stands in a negative correlation, with fairly high coefficient (γ is ca-0.7).<BR>This means he who has long feet is not so tall as becoming his feet.