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Table 2 Blood lead levels in Korean lead workers by year

From: Blood lead levels of Korean lead workers in 2003–2011

Year n Men (%) Women (%) Age (years; mean ± SD) BLL (μg/dL; GM (95% CI))
2003 31137 23402 (75.2) 7735 (24.8) 35.4 ± 9.7 5.89 (5.83-5.95)
2004 34701 27317 (78.7) 7384 (21.3) 36.7 ± 10.1 5.22 (5.17-5.27)
2005 33312 26832 (80.5) 6480 (19.5) 37.2 ± 10.1 4.62 (4.58-4.66)
2006 43899 37289 (84.9) 6610 (15.1) 37.1 ± 9.7 4.98 (4.94-5.01)
2007 43517 37650 (86.5) 5867 (13.5) 37.6 ± 9.8 4.42 (4.39-4.45)
2008 42866 37470 (87.4) 5396 (12.6) 38.3 ± 9.8 4.39 (4.35-4.42)
2009 41745 37285 (89.3) 4460 (10.7) 39.1 ± 9.9 3.77 (3.74-3.79)
2010 44382 39361 (88.7) 5021 (11.3) 38.9 ± 9.7 3.63 (3.60-3.65)
2011 49772 44118 (88.6) 5654 (11.4) 38.5 ± 9.7 3.53 (3.50-3.55)
  1. SD, standard deviation; BLL, blood lead level; GM, geometric mean; CI, confidence interval.