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A Study on Patterns of Dose for Radiation Workers in Korea.
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Soo Yong Choi, Tae Hwan Kim, Cha Kwon Chung, Chul Koo Cho
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Korean J Epidemiol. 1999;21(1):72-80.
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Abstract
This study presents data on the externally received doses for radiation workers who used the Korea Radioisotope Association's personal monitoring and dose record keeping service from 1984. Distributions of annual dose by age of worker and occupational category were given. The number of radiation workers registered was 23,257 in 1997. The trend of the number of radiation workers and their annual doses increased since 1984. The measured radiation dose were generally low. The collective annual dose and the mean annual dose were 33.45 Sv and 1.44 mSv, respectively. Very few workers(0.5%) exceeded 20 mSv(2 rem) and only 1 exceeded 50 mSv, the legal limit for dose.
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Effect of Non-dietary Factors in the Etiology of Stomach Cancer.
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Soo Yong Choi, Hye Sung Park, Hyun Sook Kim, Cha Kwon Chung
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Korean J Epidemiol. 1998;20(1):102-112.
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Abstract
BACKGROUND
Stomach cancer is the most malignant neoplasm among Koreans. There are some studies on risk factors for cancer prevention.
SUBJECTS AND METHODS: A case-control study was conducted at the Korea Cancer Center Hospital in Seoul between April and September in 1996. One hundred twenty-six stomach cancer patients confirmed by the histological diagnosis were compared with 234 control subjects mached by age, sex, and admission date. The questionnaire included information on sociodemographic characteristics, smoking and drinking habits, height, weight, family history of cancer, nutrient supplements intake etc. Associations of stomach cancer with con-dietary factors were evaluated. Multiple logistic regression models were used to estimate relative risks when controlling simultaneously for covariates.RESULTS Weight and body mass index(BMI, kg/m2) at diagnosis were significantly low in cases compared with controls. As non-dietary factors, smoking habits, alcoholic beverage, family gistory, physical activity, water supply, stress, vitamin suppliments and the use of functional foods were not associated with stomach cancer risk.CONCLUSION Our findings indicated that non-dietary factors were not associated with stomach cancer risk.
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Effect of Dietary Factors in the Etiology of Stomach Cancer.
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Hye Sung Park, Hyun Sook Kim, Soo Yong Choi, Cha Kwon Chung
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Korean J Epidemiol. 1998;20(1):82-101.
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Abstract
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Abstract
BACKGROUND
Stomach cancer is the most malignant neoplasm among Koreans. There ane a number of epidemiological studies on dietary factors of stomach cancer in many countries.
However, analytical studies on Korean dietary factors are very scarce.
SUBJECTS AND METHODS: A case-control study was conducted at the Korea Cancer Center Hospital in Seoul between April and September in 1996. One hundred twenty-six stomach cancer patients confirmed by the histological diagnosis were compared with 234 control subjects matched by age, sex, and admission date. A food frequency questionnaire asking the consumption frequency of 85 selected food items was used to gather the information from all subjects via a face-to-face interview. Multiple logistic regression models were used to estimate relative risks when controlling simultaneously for covariates.RESULTS An increased risk of stomach cancer was noted among those with low economic status, fast eating rate, high eating out, hot-temperature soup preference, salt preference, cucumber Kimchi intake, use of pickled fish in Kimchi. Intake of garlic, green onion, tofu, mung bean pancake, acorn-starch paste, starch vermicelli with mixed vegetables, total fruits, citrus fruits, cabbage, green peppers, spinach, mushrooms and total meat appeared to be protective. Stomach cancer risk was not associated with intake of rice, dairy product, fishes, condiments, coffee, tea, and the cooking methods. These data suggested that the high intake of salt and smoked or pickled food may be associated with a hig risk of stomach cancer, and this association could be due to a intragastric formation of nitrosamines. The negative association with fruits and some vegetable consumption may be due to the inhibition of nitrosation process.CONCLUSION Our findings indicated that dietary factors contributed to stomach cancer occurrence in Korea, and this may offer clues for further ethnical and prevention research.
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