Dataset Information

Effect of short-term exposure to air pollution on COVID-19 mortality and morbidity in Iranian cities.

ABSTRACT:

Purpose

The association between air pollutant (PM_2.5, PM₁₀, NO₂, and O₃) concentrations and daily number of COVID-19 confirmed cases and related deaths were evaluated in three major Iranian cities (Tehran, Mashhad, and Tabriz).

Methods

Hourly concentrations of air pollutants and daily number of PCR-confirmed cases and deaths of COVID-19 were acquired (February 20^th, 2020 to January 4^th, 2021). A generalized additive model (GAM) assuming a quasi-Poisson distribution was used to model the associations in each city up to lag-day 7 (for mortality) and 14 (for morbidity). Then, the city-specific estimates were meta-analyzed using a fixed effect model to obtain the overall relative risks (RRs).

Results

A total of 114,964 confirmed cases and 21,549 deaths were recorded in these cities. For confirmed cases, exposure to PM_2.5, NO₂, and O₃ for several lag-days showed significant associations. In case of mortality, meta-analysis estimated that the RRs for PM_2.5, PM₁₀, NO₂, and O₃ concentrations were 1.06 (95% CI: 0.99, 1.13), 1.06 (95% CI: 0.93, 1.19), 1.15 (95% CI: 0.93, 1.38), and 1.07 (95% CI: 0.84, 1.31), respectively. Despite several positive associations with all air pollutants over multiple lag-days, COVID-19 mortality was only significantly associated with NO₂ on lag-days 0-1 and 1 with the RRs of 1.35 (95% CI: 1.04, 1.67) and 1.16 (95% CI: 1.02, 1.31), respectively.

Conclusion

This study showed that air pollution can be a factor exacerbating COVID-19 infection and clinical outcomes. Actions should be taken to reduce the exposure of the public and particularly patients to ambient air pollutants.

Supplementary information

The online version contains supplementary material available at 10.1007/s40201-021-00736-4.

SUBMITTER: Hadei M

PROVIDER: S-EPMC8553398 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature

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Publications

Effect of short-term exposure to air pollution on COVID-19 mortality and morbidity in Iranian cities.

Hadei Mostafa M Hopke Philip K PK Shahsavani Abbas A Raeisi Alireza A Jafari Ahmad Jonidi AJ Yarahmadi Maryam M Farhadi Mohsen M Rahmatinia Masoumeh M Bazazpour Shahriar S Bandpey Anooshiravan Mohseni AM Zali Alireza A Kermani Majid M Vaziri Mohmmad Hossien MH Aghazadeh Mehrab M

Journal of environmental health science & engineering 20211028 2

<h4>Purpose</h4>The association between air pollutant (PM<sub>2.5</sub>, PM<sub>10</sub>, NO<sub>2</sub>, and O<sub>3</sub>) concentrations and daily number of COVID-19 confirmed cases and related deaths were evaluated in three major Iranian cities (Tehran, Mashhad, and Tabriz).<h4>Methods</h4>Hourly concentrations of air pollutants and daily number of PCR-confirmed cases and deaths of COVID-19 were acquired (February 20<sup>th</sup>, 2020 to January 4<sup>th</sup>, 2021). A generalized additive ...[more]

PMID: 34729185

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Dataset Information

Effect of short-term exposure to air pollution on COVID-19 mortality and morbidity in Iranian cities.

Purpose

Methods

Results

Conclusion

Supplementary information

Publications

Effect of short-term exposure to air pollution on COVID-19 mortality and morbidity in Iranian cities.

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