Table 2

Standardised incidence ratios (SIRs) and 95% CIs for selected cardiovascular diseases among 5866 male Danish welders followed up from 1986 to 2006 and compared with the general male population

Cardiovascular disease	Cumulative particulate exposure (mg/m³×years)	Observed	Expected	SIR	95% CI
Acute myocardial infarct	All	377	337.4	1.12	1.01 to 1.24
	0–10	11	8.7	1.26	0.63 to 2.26
	10–50	40	42.7	0.94	0.94 to 1.28
	50–100	80	63.3	1.26	1.00 to 1.57
	>100	76	77.3	0.98	0.77 to 1.23
	Missing data^*	170	145.4	1.17	1.00 to 1.36
Angina pectoris	All	437	394.5	1.11	1.01 to 1.22
	0–10	9	11.3	0.80	0.36 to 1.52
	10–50	65	57.6	1.13	0.87 to 1.44
	50–100	87	82.1	1.06	0.85 to 1.31
	>100	101	90.4	1.12	0.91 to 1.36
	Missing data^*	175	153.1	1.14	0.98 to 1.33
Chronic ischaemic heart disease	All	326	277.6	1.17	1.05 to 1.31
	0–10	5	7.3	0.68	0.22 to 1.59
	10–50	42	36.7	1.14	0.82 to 1.55
	50–100	68	55.3	1.23	0.95 to 1.56
	>100	65	65.3	1.00	0.77 to 1.27
	Missing data^*	146	15.2	1.29	1.09 to 1.52
Cerebral infarct	All	169	136.5	1.24	1.06 to 1.44
	0–10	2	3.4	0.58	0.07 to 2.10
	10–50	21	16.7	1.26	0.78 to 1.92
	50–100	30	25.6	1.17	0.79 to 1.67
	>100	46	32.1	1.43	1.05 to 1.91
	Missing data^*	70	58.7	1.19	0.93 to 1.51
Other acute ischaemic heart disease	All	14	13.02	1.08	0.59 to 1.80
Cardiac arrythmias	All	237	233.5	1.01	0.89 to 1.15
Cardiac arrest	All	32	33.7	0.95	0.65 to 1.34
Heart failure	All	157	148.8	1.05	0.90 to 1.23
Arterial embolism and thrombosis	All	11	15.3	0.72	0.36 to 1.29

↵* Welders for whom we had either incomplete information on duration of welding or no information on welding in the period 1980–86 for calculation of cumulative particulate exposure after baseline (from 1 January 1987).