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[en] Complete text of publication follows. Several studies reported that the radiation was positively related to fatty liver, low HDL cholesterol, and hypertriglyceridemia. Genetic polymorphism affect prevalence of chronic disease by molecular epidemiology studies. Apolipoprotein E is an important genetic determinant of cardiovascular disease (CVD), namely through its influence on lipid metabolism. Thus, we investigated whether radiation and apo E polymorphism, and environmental factors contribute to the lipid profile in workers of nuclear power plants in Korea. DNA was extracted from the whole blood of 6896 study subjects (6357 males and 359 females), and apo E polymorphism was investigated using PCR. Plasma lipid profiles were measured by standardized enzymatic procedures and radiation dose was measured by the thermoluminescence dosemeter (TLD). Environmental factors such as exercise, smoking were measured from health management database of KHNP. Total of 6802 subjects (aged 20-58) were investigated and radiation exposure dose was 168.51±463.94 mSv in the recent 1-year dose and 248.24±559.21 mSv in the total accumulative dose. In addition, Apo E polymorphism was associated with significant differences in total cholesterol, HDL cholesterol, radiation dose, AI but others no significant. The multiple regression model showed that total cholesterol was positively correlated with age, SBP, BMI, AI, fasting glucose. HDL cholesterol was negatively correlated with AI. LDL cholesterol was positively correlated with age, BMI, fasting glucose. And triglyceride was significantly correlated in the BMI, AI, somking dose, vegetables but others no significant. Metabolic syndrome did not show any relation to the others; only age, SBP, DBP, BMI, fasting glucose, HOMA-IR influenced. However, there was no significant association between radiation dose and lipid profile. In conclusion, Apo E and well-known variables such as SBP, BMI were significantly associated with lipid profile level but radiation was not. These results suggest that radiation doses in the nuclear power plant workers in Korea may not cause the cardiovascular disease (CVD).