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Air quality in Germany as a contributing factor to morbidity from COVID-19 #MMPMID35841971
Koch S; Hoffmann C; Caseiro A; Ledebur M; Menk M; von Schneidemesser E
Environ Res 2022[Nov]; 214 (Pt 2): 113896 PMID35841971show ga
BACKGROUND: The SARS-CoV-2 virus has been spreading in Germany since January 2020, with regional differences in incidence, morbidity, and mortality. Long-term exposure to air pollutants as nitrogen dioxide (NO(2)), nitrogen monoxide (NO), ozone (O(3)), and particulate matter (<10 mum PM(10), <2.5 mum PM(2.5)) has a negative impact on respiratory functions. We analyze the association between long-term air pollution and the outcome of SARS-CoV-2 infections in Germany. METHODS: We conducted an observational study in Germany on county-level, investigating the association between long-term (2010-2019) air pollutant exposure (European Environment Agency, AirBase data set) and COVID-19 incidence, morbidity, and mortality rate during the first outbreak of SARS-CoV-2 (open source data Robert Koch Institute). We used negative binominal models, including adjustment for risk factors (age, sex, days since first COVID-19 case, population density, socio-economic and health parameters). RESULTS: After adjustment for risk factors in the tri-pollutant model (NO(2), O(3), PM(2.5)) an increase of 1 mug/m(3) NO(2) was associated with an increase of the need for intensive care due to COVID-19 by 4.2% (95% CI 1.011-1.074), and mechanical ventilation by 4.6% (95% CI 1.010-1.084). A tendency towards an association of NO(2) with COVID-19 incidence was indicated, as the results were just outside of the defined statistical significance (+1.6% (95% CI 1.000-1.032)). Long-term annual mean NO(2) level ranged from 4.6 mug/m(3) to 32 mug/m(3). CONCLUSIONS: Our results indicate that long-term NO(2) exposure may have increased susceptibility for COVID-19 morbidity in Germany. The results demonstrate the need to reduce ambient air pollution to improve public health.