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Combined Effect of Blood Cadmium and Lead Levels on Coronary Heart Disease Prediction Risk in Korean Men

This study was designed to investigate the combined effects of cadmium (Cd) and lead (Pb) on 10-year coronary heart disease (CHD) risk calculated using the Framingham risk score. The heavy metal data set of the Korean National Health and Nutrition Examination Survey IV and V (2008-2010) was analyzed. The 10-year CHD risk was significantly associated with the log-transformed blood Cd and Pb levels in Korean men. For the highest quartile of Cd and Pb, the odds ratio (OR) of the intermediate risk and beyond for CHD (10-year risk ≥10%) compared to the lowest quartile was 6.870 (Cd, 95% confidence interval [CI]: 4.58-10.30) and 3.127 (Pb, 95% CI: 2.09-4.69) after adjusting for confounders, respectively. The adjusted OR of the intermediate risk and beyond for CHD (10-year risk ≥10%) in the fourth quartile of both Cd and Pb was 12.2 (95% CI: 8.0-18.5) compared to the reference group (first and second quartiles of Cd and Pb). However, the association between log-transformed blood Cd and Pb and the 10-year CHD risk was not significant in Korean women.