The calcium, phosphorus, iron, sodium and potassium content in school lunches in Suita City in 1973 and 1980, were calculated and compared for each food group.
The results were as follows.
1. Calcium content was 360mg and phosphorus content was 455mg with the Ca/P ratio being 0.80. The iron content was 3.2mg. No significant was obtained when difference compared with each school year.
2. NaCl content was 4.17g in 1973 and 3.38g in 1980. Showing a significant decrease in 1980 compared with 1973. Potassium contents was 0.87g in 1973 and 0.95g in 1980, with 1980 being sizable higher. There fore the Na/K ratio decreaced 1.9 to 1.4.
3. The calcium and phosphorus in the bread and milk distributed was above 70% with a high correlation (r=0.777, n=181) being found between calcium and phosporus in 1980. The iron in the bread was 39%, vegetable 13% and meat and milk 28%. The sodium in the bread was 48%, and seasonings 23%. The potassium in the milk was 33%, bread and potato 12-13%, and vegetable 18%.