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

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SUBMITTER: Hadei M 

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

REPOSITORIES: biostudies-literature