Table 4 Open in new tab Associations...

			PM_2.5-Total	UFP_Total	EC_Total	NO_2-Total
	18 344 976	94 256	1.077	(1.061–1.094)	1.039	(1.026–1.052)	1.009	(1.001–1.018)	1.028	(1.017–1.040)
Age (years)
50–70	12 003 115	30 956	1.051	(1.031–1.072)	1.016	(0.998–1.034)	1.003	(0.991–1.016)	1.024	(1.007–1.040)
70–80	4 324 321	31 998	1.096	(1.075–1.118)	1.054	(1.036–1.072)	1.015	(1.004–1.027)	1.039	(1.022–1.055)
80+	2 014 539	31 302	1.085	(1.063–1.107)	1.049	(1.030–1.067)	1.008	(0.995–1.022)	1.022	(1.006–1.038)

			PM_2.5-Total	UFP_Total	EC_Total	NO_2-Total
	18 344 976	94 256	1.077	(1.061–1.094)	1.039	(1.026–1.052)	1.009	(1.001–1.018)	1.028	(1.017–1.040)
Age (years)
50–70	12 003 115	30 956	1.051	(1.031–1.072)	1.016	(0.998–1.034)	1.003	(0.991–1.016)	1.024	(1.007–1.040)
70–80	4 324 321	31 998	1.096	(1.075–1.118)	1.054	(1.036–1.072)	1.015	(1.004–1.027)	1.039	(1.022–1.055)
80+	2 014 539	31 302	1.085	(1.063–1.107)	1.049	(1.030–1.067)	1.008	(0.995–1.022)	1.022	(1.006–1.038)

Table 4

Associations between 5-year averages of air pollutants and stroke in entire population and stratified by age

			PM_2.5-Total		UFP_Total		EC_Total		NO_2-Total
	Person-years	Cases (n)	HR	95% CI^a	HR	95% CI^a	HR	95% CI^a	HR	95% CI^a
	18 344 976	94 256	1.077	(1.061–1.094)	1.039	(1.026–1.052)	1.009	(1.001–1.018)	1.028	(1.017–1.040)
Age (years)
50–70	12 003 115	30 956	1.051	(1.031–1.072)	1.016	(0.998–1.034)	1.003	(0.991–1.016)	1.024	(1.007–1.040)
70–80	4 324 321	31 998	1.096	(1.075–1.118)	1.054	(1.036–1.072)	1.015	(1.004–1.027)	1.039	(1.022–1.055)
80+	2 014 539	31 302	1.085	(1.063–1.107)	1.049	(1.030–1.067)	1.008	(0.995–1.022)	1.022	(1.006–1.038)

			PM_2.5-Total		UFP_Total		EC_Total		NO_2-Total
	Person-years	Cases (n)	HR	95% CI^a	HR	95% CI^a	HR	95% CI^a	HR	95% CI^a
	18 344 976	94 256	1.077	(1.061–1.094)	1.039	(1.026–1.052)	1.009	(1.001–1.018)	1.028	(1.017–1.040)
Age (years)
50–70	12 003 115	30 956	1.051	(1.031–1.072)	1.016	(0.998–1.034)	1.003	(0.991–1.016)	1.024	(1.007–1.040)
70–80	4 324 321	31 998	1.096	(1.075–1.118)	1.054	(1.036–1.072)	1.015	(1.004–1.027)	1.039	(1.022–1.055)
80+	2 014 539	31 302	1.085	(1.063–1.107)	1.049	(1.030–1.067)	1.008	(0.995–1.022)	1.022	(1.006–1.038)

PM_2.5, particulate matter <2.5 µm; UFP, ultrafine particles; EC, elemental carbon; NO₂, nitrogen dioxide; IQR, inter quartile range; HR, hazard ratio.

Adjusted for age, sex, calendar period, marital status, education, occupational status, ethnicity, personal and household income and percentage of parish population: living in social housing, being sole providers, of non-Western origin, having low income, being unemployed, having blue-collar work, having only basic education and having a criminal record.

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