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Long-term exposure to air pollution and severe COVID-19 in Catalonia: a population-based cohort study
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Long-term exposure to air pollution and severe COVID-19 in Catalonia: a population-based cohort study
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Journal Article
Long-term exposure to air pollution and severe COVID-19 in Catalonia: a population-based cohort study
2023
Overview
The association between long-term exposure to ambient air pollutants and severe COVID-19 is uncertain. We followed 4,660,502 adults from the general population in 2020 in Catalonia, Spain. Cox proportional models were fit to evaluate the association between annual averages of PM
2.5
, NO
2
, BC, and O
3
at each participant’s residential address and severe COVID-19. Higher exposure to PM
2.5,
NO
2,
and BC was associated with an increased risk of COVID-19 hospitalization, ICU admission, death, and hospital length of stay. An increase of 3.2 µg/m
3
of PM
2.5
was associated with a 19% (95% CI, 16–21) increase in hospitalizations. An increase of 16.1 µg/m
3
of NO
2
was associated with a 42% (95% CI, 30–55) increase in ICU admissions. An increase of 0.7 µg/m
3
of BC was associated with a 6% (95% CI, 0–13) increase in deaths. O
3
was positively associated with severe outcomes when adjusted by NO
2
. Our study contributes robust evidence that long-term exposure to air pollutants is associated with severe COVID-19.
In this study, the authors investigate the relationship between exposure to air pollutants and severe COVID-19 disease using data from a cohort of ~5 million people in Catalonia, Spain. They find that long-term exposure to pollutants is associated with a higher risk of COVID-19-related hospitalization, death, intensive care admission, and length of hospital stay.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
