Abstract
The authors tried to obtain characteristics of physical types in infants and young children. The purpose of this second report of our research is to get the characteristics of the body proportion of infants and young children. The authors calculated 16 indices relative to stature, bust girth, and weight, on 1, 468 subjects, which were the same as Part 1.
The following results were obtained :
1) Mean values of 16 indices about infants and young children aged from 10 months to 6 years and 3 months are given in Table 1 and the mean curves of 16 indices are classified into the following three types : An increasing type, A decreasing type, and An increasing-decreasing type.
2) Sex differences on the body proportion are recognized significantly at each age groups from 1.5 to 6 years with the exception of 1 year. Girls had a greater value than boys in the following six indices : lower extremity length/stature, crotch height/stature, abdomen girth/bust girth, hip girth/bust girth, upper arm girth/bust girth and thigh girth/bust girth. On the other hand, boys had a greater value than girls in foot length/stature and bust girth/stature.
3) In comparison with adults, the infants and young children aged from 1 to 6 years had, in both sexes, an extremely large head, short legs, large feet, a prominent abdomen, and a large neck-base girth without waist constriction.
