Review of carcinogenicity of asbestos and proposal of approval standards of an occupational cancer caused by asbestos in Korea

Table 11 Exposure characteristics of the study subjects

Variables		No	Percent
Major carcinogen caused lung cancer	Asbestos	105	50
	Crystaline silica	42	20
	Cr6+	26	12.4
	Welding fume including Cr6+,nickel	18	8.6
	DEE^a	5	2.4
	Rubber dust	2	1.0
	CTPV^b & PAH^c	3	1.4
	Coke oven emission (COE)	1	0.5
Year at first exposure	-1969	12	5.7
	1970-1979	73	34.8
	1980-1989	91	43.3
	1990-1999	33	15.7
	2000-	1	0.5
Exposure duration(years)	<10	12	5.7
	≥10 and < 20	84	40
	≥20 and < 30	92	43.8
	≥30	22	10.5
	Mean ± S.D.^d	19.8 ± 9.9
	Mean ± S.D.^e	22.5 ± 8.4
Latent duration(years)	<10	5	2.4
	≥10 and < 20	62	29.5
	≥20 and < 30	95	45.2
	≥30	48	22.9
	Mean ± S.D.^d	23.0 ± 9.9
	Mean ± S.D.^e	26.6 ± 7.5

^aDEE is the abbreviation of diesel engine exhaust; ^bCTPV is coal tar pitch volatile; ^cPAH is polyaromatic hydrocarbons
^dValues are given as mean ± S.D. of lung cancer-asbestos exposure case report data in KOSHA; S.D. is the abbreviation of standard deviation
^eValues are given as mean ± S.D. of lung cancer-asbestos exposure case report data in occupational lung diseases institute (2004-2011)

ISSN: 2052-4374