Table 2

Relative risk ratios (RRR) and 95% confidence intervals (CI) due to stroke among male professional drivers living in Greater Copenhagen (GC) compared to those living outside GC

	Greater Copenhagen			Denmark outside GC			RRR	95% CI
	No.	Obs.	Exp.	No.	Obs.	Exp.	RRR	95% CI
Stroke (I60–I64)
Car, taxi, and van drivers	1438	44	27.4	2941	73	48.7	1.07	0.72–1.58
Bus drivers	1539	36	26.3	4973	120	86.7	0.99	0.66–1.45
Heavy truck and lorry drivers	3180	62	43.7	23303	391	317.8	1.15	0.87–1.51
All male drivers	6157	142	97.4	31217	584	453.2	1.13	0.94–1.36

Non-traumatic intracranial haemorrhage (I60–I62)
Car, taxi, and van drivers	1438	11	6.0	2941	11	10.8	1.80	0.71–4.58
Bus drivers	1539	10	5.9	4973	22	19.0	1.47	0.62–3.22
Heavy truck and lorry drivers	3180	13	10.3	23303	77	74.7	1.23	0.62–2.22
All male drivers	6157	34	22.2	31217	110	104.5	1.45	0.96–2.15

Cerebral infarction (I63)
Car, taxi, and van drivers	1438	17	9.0	2941	34	21.7	1.21	0.63–2.22
Bus drivers	1539	7	8.6	4973	57	38.6	0.55	0.21–1.21
Heavy truck and lorry drivers	3180	14	14.0	23303	190	139.4	0.73	0.39–1.26
All male drivers	6157	38	31.6	31217	281	199.7	0.86	0.59–1.20