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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)
  1. Industries are classified by the 8th Korean standard industrial classification
  2. Source: Kim EA et al. [12]