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Table 4 Geometric means of blood lead levels by Korean industry division (Manufacturing; 2003–2011)

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

KSIC-9 code Industry division n GM (μg/dL; 95% CI)
28 Manufacture of Electrical Equipment 35389 7.80 (7.71-7.89)
22 Manufacture of Rubber and Plastic Products 7149 7.35 (7.18-7.52)
24 Manufacture of Basic Metal Products 32279 6.77 (6.70-6.84)
23 Manufacture of Other Non-metallic Mineral Products 5639 6.27 (6.14-6.40)
20 Manufacture of Chemicals and Chemical Products, Except Pharmaceuticals and Medicinal Chemicals 16712 5.93 (5.84-6.02)
25 Manufacture of Fabricated Metal Products, Except Machinery and Furniture 9904 5.03 (4.95-5.11)
29 Manufacture of Other Machinery and Equipment 16217 3.79 (3.75-3.83)
27 Manufacture of Medical, Precision and Optical Instruments, Watches and Clocks 9346 3.63 (3.58-3.69)
30 Manufacture of Motor Vehicles, Trailers, and Semitrailers 17334 3.58 (3.53-3.62)
31 Manufacture of Other Transport Equipment 53463 3.57 (3.55-3.58)
26 Manufacture of Electronic Components, Computer, Radio, Television and Communication Equipment and Apparatuses 69587 3.24 (3.22-3.26)
Total   273019 4.50 (4.48-4.51)
  1. KSIC-9, Korean Standard Industrial Classification; GM, geometric mean; CI, confidence interval.