日本人成年婦女子の足長と身長との関係

抄録

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.
I. On the side difference of footlength.
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.
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.
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.
II. Relation between stature and footlength.
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.
b) Correlation between stature and enlarge rate of the footlength (stature/footlength= reciprocal of relative footlength) is very low.
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
Our results do not satisfy above expression, simply because the subjects of our study are biological materials having much deviations.
d) Relation of enlarge rate of footlength stands in a negative correlation, with fairly high coefficient (γ is ca-0.7).
This means he who has long feet is not so tall as becoming his feet.