Association Between Blood Merucry and Overweight For Korean Workers
This study assessed the association of blood mercury levels with overweight in Korean manual workers. We analyzed cross-sectional data from 3,967 participants (2,292 men and 1,675 women) who completed the Korean National Health and Nutrition Examination Survey (KNHANES), 2007–2013. We use the WHO overweight (including obesity) criteria using BMI≥23.0 kg/m2. Blood mercury levels were analyzed using a gold amalgam method with a DMA-80 instrument, categorized into quartiles, and stratified by sex. After adjusting for all covariates, blood mercury was significantly associated with overweight in a dose-dependent manner. The adjusted odds ratio of being in the highest blood mercury quartile was 2.06 (95% confidence interval [CI], 1.69-2.50) overall, 2.42 (95% CI, 1.88–3.13) in men, and 1.86 (95% CI, 1.39–2.50) in women. Additionally, a trend in overweight across increasing blood mercury levels was observed by the p for trend test in the multiple diagnostic criteria.
Keywords— Overweight, Weight gain, Korean manual workers, Heavy metals, Mercury.