Blood Lead Levels and Cause-Specific Mortality of Inorganic Lead-Exposed Workers in South Korea.

The objective of this study was to identify the association of blood lead level (BLL) with mortality in inorganic lead-exposed workers of South Korea. A cohort was compiled comprising 81,067 inorganic lead exposed workers working between January 1, 2000, and December 31, 2004. This cohort was merged with the Korean National Statistical Office to follow-up for mortality between 2000 and 2008. After adjusting for age and other carcinogenic metal exposure, all-cause mortality (Relative risk [RR] 1.36, 95% confidence interval [CI] 1.03-1.79), digestive disease (RR 3.23, 95% CI 1.33-7.86), and intentional self-harm (RR 2.92, 95% CI 1.07-7.81) were statistically significantly higher in males with BLL >20 μg/dl than of those with BLL ≤10μg/dl. The RR of males with BLL of 10-20 μg/dl was statistically higher than of those with BLL ≤10μg/dl in infection (RR 3.73. 95% CI, 1.06-13.06). The RRs of females with 10-20 μg/dl BLL was statistically significantly greater than those with BLL