Table 4.
Geometric means of blood lead levels by Korean industry division (Manufacturing; 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) |
KSIC-9, Korean Standard Industrial Classification; GM, geometric mean; CI, confidence interval.