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Table 1 Blood lead levels in Korean lead workers measured during a special health examination (2003–2011)

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

  n (%) Age (years; mean ± SD) BLL (μg/dL; GM (95% CI)) p-value*
Total 365331 (100) 37.8 ± 9.9 4.35 (4.34-4.36)  
Men 310724 (85.0) 38.2 ± 9.7 4.62 (4.61-4.63) < 0.001
Women 54607 (14.9) 35.4 ± 10.6 3.09 (3.07-3.11)
  1. *determined using a t-test.
  2. SD, standard deviation; BLL, blood lead level; GM, geometric mean; CI, confidence interval.