Chronological correlation analysis studies with 10 to 12 years lag period between various foods/nutrients intakes and mortalities of gastro-intestinal cancers such as stomach cancer, colorectal cancer in Korea were performed to investigate the
effect of
dietary factors on carcinogenesis.
Information on the foods/nutrients intake from 1969 to 1988 were obtained from National Nutritional Survey Report published annually by Ministry of Health and Social Affairs. Deta on the death due to stomach and colorectal cancers between 1981
and
1990
were gathered from Annual report on the cause of death statistics, National Stati Stical Office and Data on the morbidity from Medical insurance statistical yearbook, Korea Medical Insurance Corporation.
Since 1969, the intakes of total energy and cereals which is a major supplier of carbohydrate have gradually decreased, Whereas, those of total protein, protein from animal sources, lipid have remarkably increased in recent years. While the
mortality
from stomach cancer has increased upto 1984, and then decreased steadily for male and female. That of coloncancer has increased continuously during this period. The mortality of male stomach cancer has correlated only with niacin among various
nutrients. There appears to be no good, correlating food group or nutrient found whth mortalities of female stomachcancer. In general, colorectal cancer has positive correlations with lipid and animal protein, and has inverse correlations with
energy
from cereals and the rate of vegetable food to total intakes.
This study might suggest that the trend in incidence of gastro-intestinal cancers in Korea is westernized as the patterns of food intake have become more meat-centered or being various in items
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