Table 4. Relative risk (RR) of hazard ratio of non-malignant deaths (compared with non-production workers).

		Production	Melting & pouring	Molding & core making	Fettling	Uncategorized
Person-years		150,714	33,245	52,052	37,343	37,096
All non-malignant death	N	585	99	204	149	154
	RRa	2.00	1.50	1.91	1.92	2.52
	95% CI	1.57–2.56	1.11–2.04	1.46–2.51	1.45–2.55	1.90–2.34
Diseases of the circulatory system	N	128	24	39	31	40
	RR	1.92	1.64	1.60	1.71	2.75
	95%CI	1.18–3.14	0.86–3.11	0.91–2.85	0.95–3.07	1.57–4.80
Ischemic heart diseases	N	33	9	7	8	9
	RR	1.60	1.94	0.85	1.44	1.86
	95%CI	0.66–3.88	0.67–5.61	0.28–2.55	0.49–4.25	0.65–5.34
Cerebrovascular diseases	N	61	8	21	17	21
	RR	1.85	1.01	1.64	1.93	2.91
	95%CI	0.93–3.68	0.42–2.85	0.75–3.61	0.85–4.35	1.34–6.30
Diseases of the respiratory system	N	25	3	6	5	11
	RR	2.68	1.38	1.74	1.66	5.71
	95%CI	0.79–9.15	0.26–7.29	0.41–7.44	0.39–7.06	1.52–21.42
Pneumonia	N	8	1	3	1	3
	RR	1.11	0.57	1.10	0.46	1.84
	95%CI	0.23–5.34	0.05–6.39	0.18–6.69	0.04–5.12	0.30–11.37
Diseases of the digestive system	N	102	13	48	20	23
	RR	2.27	1.29	2.95	1.68	2.21
	95%CI	1.22–4.24	0.58–2.89	1.53–5.68	0.81–3.51	1.07–4.56
Liver diseases	N	93	11	45	19	20
	RR	2.55	1.35	3.39	1.96	2.38
	95%CI	1.28–5.06	0.56–3.25	1.66–6.95	0.89–4.34	1.08–5.25
Diseases of the genitourinary system	N	9	0	2	0	7
	RR	0.94	–	0.49	–	3.39
	95%CI	0.24–3.63	–	0.08–2.97	–	0.84–13.70
Injury, poisoning and other consequences of external causes	N	219	49	72	60	47
	RR	2.36	2.34	2.22	2.51	2.28
	95%CI	1.52–3.66	1.44–3.95	1.37–3.57	1.54–4.09	1.37–3.79
Suicide	N	61	15	18	18	13
	RR	3.64	4.05	3.07	4.11	3.73
	95%CI	1.32–10.01	1.34–12.21	1.04–9.08	1.39–12.16	1.20–11.57

^aCox-proportional hazard model: stratified on age and employment duration.