Table 3. Standardized Mortality Ratio (SMR) of malignant disease (Reference: Korean men).

		Non-production	Production	Total
Person-years		38,017	154,584	192,600
All malignant diseases	N	41	274	315
	SMR	0.64	1.04	0.96
	95%CI	0.46–0.87	0.92–1.17	0.86–1.07
Stomach	N	4	53	57
	SMR	0.33	1.08	0.93
	95%CI	0.09–0.84	0.81–1.41	0.70–1.20
Colon	N	5	18	23
	SMR	1.21	1.06	1.09
	95%CI	0.39–2.83	0.63–1.68	0.69–1.64
Liver	N	14	73	87
	SMR	0.86	0.99	0.97
	95%CI	0.47–1.44	0.78–1.25	0.78–1.20
Pancreas	N	2	9	11
	SMR	0.74	0.78	0.78
	95%CI	0.08–2.66	0.36–1.49	0.39–1.39
Lung	n	9	56	65
	SMR	0.67	1.06	0.98
	95%CI	0.31–1.27	0.80–1.38	0.76–1.25
Urinary bladder	N	2	5	7
	SMR	2.91	2.04	2.23
	95%CI	0.33–10.51	0.66–4.77	0.90–4.60
Lympohematopoietic	N	2	16	18
	SMR	0.75	1.44	1.3
	95%CI	0.08–2.70	0.82–2.33	0.77–2.06