Exploring Spatiotemporal Pattern in the Association Between Short-term Exposure to Fine Particulate Matter and COVID-19 Incidence in the Continental United States: a Leroux-conditional-autoregression-based Strategy

Overview

Journal Front Public Health

Specialty Public Health

Date 2024 Jan 8

PMID 38186711

Authors

Shiyi Liu

Shuming Ji

Jianjun Xu

Yujing Zhang

Han Zhang

Jiahe Liu

Donghao Lu

Affiliations

Soon will be listed here.

Abstract

Background: Numerous studies have demonstrated that fine particulate matter (PM) is adversely associated with COVID-19 incidence. However, few studies have explored the spatiotemporal heterogeneity in this association, which is critical for developing cost-effective pollution-related policies for a specific location and epidemic stage, as well as, understanding the temporal change of association between PM and an emerging infectious disease like COVID-19.

Methods: The outcome was state-level daily COVID-19 cases in 49 native United States between April 1, 2020 and December 31, 2021. The exposure variable was the moving average of PM with a lag range of 0-14 days. A latest proposed strategy was used to investigate the spatial distribution of PM-COVID-19 association in state level. First, generalized additive models were independently constructed for each state to obtain the rough association estimations, which then were smoothed using a Leroux-prior-based conditional autoregression. Finally, a modified time-varying approach was used to analyze the temporal change of association and explore the potential causes spatiotemporal heterogeneity.

Results: In all states, a positive association between PM and COVID-19 incidence was observed. Nearly one-third of these states, mainly located in the northeastern and middle-northern United States, exhibited statistically significant. On average, a 1 μg/m increase in PM concentration led to an increase in COVID-19 incidence by 0.92% (95%CI: 0.63-1.23%). A U-shaped temporal change of association was examined, with the strongest association occurring in the end of 2021 and the weakest association occurring in September 1, 2020 and July 1, 2021. Vaccination rate was identified as a significant cause for the association heterogeneity, with a stronger association occurring at a higher vaccination rate.

Conclusion: Short-term exposure to PM and COVID-19 incidence presented positive association in the United States, which exhibited a significant spatiotemporal heterogeneity with strong association in the eastern and middle regions and with a U-shaped temporal change.

Citing Articles

Using a Leroux-prior-based conditional autoregression-based strategy to map the short-term association between temperature and bacillary dysentery and its attributable burden in China.

Wang J, Lu K, Wei Y, Wang W, Zhou Y, Zeng J Front Public Health. 2024; 12:1297635.

PMID: 38827625 PMC: 11140140. DOI: 10.3389/fpubh.2024.1297635.

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