Table 2 Top 15 number of samples of measurement of concentration of work-environmental formaldehyde by sub-categories of industries in Korea, 2002–2010
From: Does formaldehyde have a causal association with nasopharyngeal cancer and leukaemia?
Industry | No. of samples (A) | No. of detected samples (B) | Detection rate (B/A) | Geometric mean, ppm (range) |
|---|---|---|---|---|
24. Manufacture of chemicals and chemical products | 5370 | 4727 | 0.880 | 0.022 (0–25.598) |
34. Manufacture of motor vehicles, trailers and semitrailers | 3396 | 2929 | 0.862 | 0.011 (0–41.543) |
20. Manufacture of wood products of wood and cork;except furniture | 3075 | 2929 | 0.953 | 0.053 (0–62.479) |
32. Manufacture of electrical components, audio, visual and communication equipment | 2932 | 2608 | 0.889 | 0.020 (0–1.443) |
27. Manufacture of basic metal products | 2749 | 2414 | 0.878 | 0.015 (0–45.706) |
17. Manufacture of textiles, except apparel | 2409 | 2135 | 0.886 | 0.016 (0–16.800) |
36. Manufacture of furniture and others | 2227 | 2077 | 0.933 | 0.024 (0–4.152) |
29. Manufacture of other machinery and equipment | 1722 | 1286 | 0.747 | 0.014 (0–7.711) |
85. Human health service | 1630 | 1319 | 0.809 | 0.023 (0–25.300) |
26. Manufacture of other non-metallic mineral products | 1207 | 1075 | 0.891 | 0.034 (0–26.800) |
28. Manufacture of fabricated metal products, except machinery and furniture | 1020 | 922 | 0.904 | 0.023 (0–2.010) |
25. Manufacture of rubber and plastic products | 891 | 745 | 0.836 | 0.020 (0–0.990) |
21. Manufacture of pulp, paper and paper products | 739 | 632 | 0.855 | 0.013 (0–2.384) |
31. Manufacture of electrical equipment | 558 | 446 | 0.862 | 0.006 (0–32.900) |
73. Scientific research and development | 501 | 107 | 0.953 | 0.016 (0–1.500) |