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'Source-specific' air pollution and risk of stroke in Denmark.

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Název: 'Source-specific' air pollution and risk of stroke in Denmark.
Autoři: Poulsen, Aslak Harbo, Sørensen, Mette, Hvidtfeldt, Ulla Arthur, Brandt, Jørgen, Frohn, Lise Marie, Ketzel, Matthias, Christensen, Jesper H, Im, Ulas, Raaschou-Nielsen, Ole
Zdroj: International Journal of Epidemiology; Jun2023, Vol. 52 Issue 3, p727-737, 11p
Témata: STROKE, AIR pollution, PROPORTIONAL hazards models, DISEASE risk factors
Geografický termín: DENMARK
Abstrakt: Background Long-term air pollution is a risk factor for stroke. Which types and sources of air pollution contribute most to stroke in populations is unknown. We investigated whether risk of stroke differed by type and source of air pollution. Methods We selected all persons aged >50 years and living in Denmark in the period 2005–17. We estimated running 5-year mean residential air-pollution concentrations of particulate matter <2.5 µm (PM2.5), ultrafine particles (UFP), elemental carbon (EC) and nitrogen dioxide (NO2). Pollutants were modelled as total air pollution from all emission sources, as well as apportioned into contributions from non-traffic and traffic sources. Hazard ratios (HRs) and CIs were estimated by using Cox proportional hazards models, adjusting for area-level and personal demographic and socio-economic covariates. We identified all primary strokes from hospital and mortality registers. Results The cohort numbered 2 million people and 94 256 cases of stroke. Interquartile ranges (IQR) of air pollution were associated with risk of stroke with HRs of 1.077 (95% CI: 1.061–1.094, IQR: 1.85 µg/m3) for PM2.5, 1.039 (1.026–1.052, IQR: 4248 particles/cm3) for UFP, 1.009 (1.001–1.018, IQR: 0.28 µg/m3) for EC and 1.028 (1.017–1.040, IQR: 7.15 µg/m3) for NO2. Traffic sources contributed little to the total exposure. HRs associated with air pollution from traffic were close to the null, whereas non-traffic sources tended to be associated with HRs higher than those for total air pollution, e.g. for non-traffic PM2.5, the HR was 1.091 (1.074–1.108). Conclusions Air pollution, including UFP, was associated with risk of stroke. The risk appeared attributable mainly to air pollution from non-traffic sources. [ABSTRACT FROM AUTHOR]
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Databáze: Complementary Index
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