We analysed 398 kinds of processed foods sold on market - 43 kinds of ramyun, 67 kinds of bread, 104 kinds of cookies, 5 kinds of pizza, 28 kinds of sausage, 31 kinds of steamed fish cake, 4 kinds of tomato ketchup, 30 kinds of canned goods, 82 kinds of beverage and 4 kinds of danmoogi - to know mineral content such as P, Ca, Mg, Na and K. We used atomic absorption spectrophotometry for this study and the results were as follows; 1) P content was 204.24㎎% in sausages, 101.80㎎% in pizza, 67㎎% in canned fish, 44.50㎎% in canned vegetable, 38.62㎎% in ramyun and 32.10㎎% in steamed fish cake. Sausage had the highest P content showing almost 6 times as much as steamed fish cake. There was little difference between ramyun and steamed fish cake. 2) Ca content was 115.00㎎% in pizza, 106.94㎎% in steamed fish cake, 100.59㎎% in sausage, 91.25㎎% in canned vegetable, 79.84㎎% in bread and 78.97㎎% in ramyun. 3) Mg content was 555.16㎎% in steamed fish cake, 476.14㎎% in cookies, 436.75㎎% in ketchup, 394.00㎎% in canned vegetable, 346.95㎎% in ramyun and 341.40㎎% in canned fish. Steamed fish cake was highest in Mg content and there was little difference between ramyun and canned fish. 4) Na content was 730.49㎎% in ramyun, 680.25㎎% in danmoogi, 548.43㎎% sausage, 463.50㎎% in canned vegetable, 449.25㎎% in ketchup, 401.29㎎% in steamed fish cake and 366.00㎎% in pizza. Ramyun had the highest Na content. 5) K content was 302.30㎎% in pizza, 280.25㎎% in ketchup, 219.68㎎% in sausage, 219.2㎎% in canned fish, 183.75㎎% in canned vegetable, 166.49㎎% in ramyun and 122.77㎎% in cookies. Pizza had the highest K content.

Patterns in the outbreaks of senile diseases were investigated on 1, 264 workers by special examination among the 43, 210 industrial workers by the screening test performed in Kwang-ju and Chon-nam Branch of Korean Industrial Health Association from January 4 to December 31 in 1991. The results are summarized as follows : 1) Prevalence rate of senile diseases of industrial workers was 2.9%. And prevalence rate according to the kinds of senile diseases was observed in the order of hepatitis (0.9%), hypertension(0.7%), diabetes mellitus(0.5%), anemia(0.4%). 2) Prevalence rate of complicated senile diseases of industrial workers was 0.5%. And prevalence rate according to kinds of complicated senile diseases was observed in the order of others hypertension and arteriosclerosis(0.1%), HBV and others chronic hepatitis(0.1%), essential hypertension and arteriosclerosis(0.03%), iron deficiency anemia and leukopenia(0.03%).