わが国における身長の最大発育年齢と栄養水準の推移との関連

概要

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Use of the rapid lowering of age of maximum increment in height (MI age) in Japan after the World War II has permitted investigation of how changes in nutritional levels relate to the acceleration of growth. MI age calculations were based on the Annual Statistical Report of the School Health Survey published by the Ministry of Education. Data on nutritional level were derived from the National Nourishment Situation produced by the Ministry of Health and Welfare.The results were as follows:1) Similar tendencies towards lowered MI ages are seen for intake of nutrients (fats and oils, carbohydrates, calcium, and vitamin B2), intake of eggs by food groups, energy supply-ratios from cereals and from starchy foods.2) Time lags are read on time lag analysis as 17-22 years at the maximum correlation coefficient observed between each birth-year cohort and the greatest portion of nutritional changes. The nutritional level for the group 17-22 years of age over MI age closely corresponded with the MI age.3) It is therefore difficult to affirm that change in nutritional level is an indicator of MI age, but social changes in Japan including economic development have presumably brought about changes in the diet and simultaneously caused the acceleration.