Abstract
Direct roentgenograms of dorso-ventral projection were examined on 1, 210 subjects in the sixth and seventh decades living in the different environments of farm, fishing and urban districts. The roentgenographic findings were classified into three grades according to osteoporotic changes, and the prevalence of osteoporotic changes was compared by χ2-tests among the districts. The prevalence was higher in the farm districts as compared to those in the fishing and urban districts. The examinees of the two districts, the farm and the fishing, were somatometrically measured of their spinal crookedness, and the results showed that the occurrence of crookedness was higher with concurrent high prevalence of osteoporosis in the farm village. Nutritional survey processed in all the five districts showed the causative difference of habitual food intake among the districts.
