Table 5

1-day lag association between ozone exposure and ischaemic cerebrovascular event or myocardial infarction according to vascular risk factors

		Ischaemic cerebrovascular event (incident and recurrent)			Myocardial infarction (incident and recurrent)
		No	OR	95% CI	No	OR	95% CI
Patients with one vascular factor
Hypercholesterolaemia	Yes	540	1.032	0.960 to 1.111	399	1.111	1.020 to 1.211
Hypercholesterolaemia	No	1004	0.987	0.935 to 1.043	514	0.911	0.842 to 0.985
Hypertension	Yes	1047	1.041	0.987 to 1.097	487	1.014	0.937 to 1.097
Hypertension	No	501	0.930	0.861 to 1.004	426	0.974	0.895 to 1.060
Diabetes	Yes	269	1.138	1.027 to 1.260	208	0.981	0.873 to 1.102
Diabetes	No	1274	0.975	0.929 to 1.024	705	1.000	0.936 to 1.069
Tobacco^*	Yes	498	1.020	0.945 to 1.102	513	0.979	0.906 to 1.058
Tobacco^*	No	831	0.992	0.935 to 1.054	383	1.013	0.928 to 1.105
Patients with two vascular factors
Hypercholesterolaemia+hypertension	Yes	402	1.067	0.980 to 1.162	243	1.150	1.030 to 1.284
Hypercholesterolaemia+hypertension	No	363	0.928	0.847 to 1.016	270	0.933	0.837 to 1.039
Hypercholesterolaemia+diabetes	Yes	152	1.176	1.027 to 1.346	116	1.245	1.061 to 1.460
Hypercholesterolaemia+diabetes	No	887	0.974	0.919 to 1.033	422	0.962	0.882 to 1.049
Hypercholesterolaemia+tobacco	Yes	198	1.054	0.934 to 1.191	225	1.136	1.014 to 1.272
Hypercholesterolaemia+tobacco	No	541	0.970	0.899 to 1.046	214	0.967	0.861 to 1.087
Hypertension+diabetes	Yes	212	1.153	1.028 to 1.292	151	0.998	0.870 to 1.145
Hypertension+diabetes	No	444	0.911	0.840 to 0.988	369	0.983	0.897 to 1.077
Hypertension+tobacco	Yes	317	1.094	0.996 to 1.203	228	0.994	0.888 to 1.112
Hypertension+tobacco	No	259	0.976	0.879 to 1.084	134	0.992	0.862 to 1.141
Diabetes+tobacco	Yes	77	1.264	1.040 to 1.536	112	0.927	0.792 to 1.085
Diabetes+tobacco	No	672	0.958	0.895 to 1.025	290	1.003	0.907 to 1.110
Patients with three vascular factors
Hypercholesterolaemia+hypertension+tobacco	Yes	145	1.114	0.967 to 1.284	118	1.168	1.002 to 1.360
Hypercholesterolaemia+hypertension+tobacco	No	183	0.970	0.854 to 1.101	88	0.991	0.834 to 1.177
Hypercholesterolaemia+hypertension+diabetes	Yes	123	1.208	1.042 to 1.401	85	1.352	1.119 to 1.634
Hypercholesterolaemia+hypertension+diabetes	No	335	0.912	0.829 to 1.003	244	0.944	0.842 to 1.059
Hypercholesterolaemia+tobacco+diabetes	Yes	48	1.432	1.105 to 1.856	68	1.182	0.966 to 1.446
Hypercholesterolaemia+tobacco+diabetes	No	471	0.946	0.872 to 1.026	169	1.010	0.885 to 1.152
Hypertension+tobacco+hypercholesterolaemia	Yes	62	1.374	1.101 to 1.715	77	0.940	0.780 to 1.132
Hypertension+tobacco+hypercholesterolaemia	No	219	0.946	0.845 to 1.059	113	0.999	0.855 to 1.167
Patients with four vasculars factors
Hypercholesterolaemia+HT+diabetes+tobacco	Yes	42	1.523	1.149 to 2.018	49	1.213	0.960 to 1.532
Hypercholesterolaemia+HT+diabetes+tobacco	No	166	0.939	0.823 to 1.073	79	0.982	0.814 to 1.184

↵* Ex-smoker and current smoker.
OR, adjusted odds ratio for minimum temperature (1-day lag), maximum relative humidity (1-day lag), school and public holidays, and flu epidemics (0-day lag).