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Causal Relationship Between Particulate Matter 2.5 and Infectious Diseases: A Two-sample Mendelian Randomization Study

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Journal Heliyon
Specialty Social Sciences
Date 2024 Jan 1
PMID 38163134
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Abstract

Background: Previous observational studies suggested a correlation between particulate matter 2.5 (PM) and infectious diseases, but causality remained uncertain. This study utilized Mendelian randomization (MR) analysis to investigate causal relationships between PM concentrations and various infectious diseases (COVID-19 infection, hospitalized COVID-19, very severe COVID-19, urinary tract infection, bacterial pneumonia, and intestinal infection).

Methods: Inverse variance weighted (IVW) was the primary method for evaluating causal associations. For significant causal estimates, multiple sensitivity tests were further performed: (i) three additional MR methods (MR-Egger, weighted median, and maximum likelihood method) for supplementing IVW; (ii) Cochrane's Q test for assessing heterogeneity; (iii) MR-Egger intercept test and MR-PRESSO global test for evaluating horizontal pleiotropy; (iv) leave-one-out sensitivity test for determining the stability.

Results: PM concentration significantly increased the risk of hospitalized COVID-19 (OR = 1.91, 95 % CI: 1.06-3.45,  = 0.032) and very severe COVID-19 (OR = 3.29, 95 % CI: 1.48-7.35,  = 3.62E-03). However, no causal effect was identified for PM concentration on other infectious diseases ( > 0.05). Furthermore, various sensitivity tests demonstrated the reliability of significant causal relationships.

Conclusions: Overall, lifetime elevated PM concentration increases the risk of hospitalized COVID-19 and very severe COVID-19. Therefore, controlling air pollution may help mitigate COVID-19 progression.

Citing Articles

Association between air pollution and skin cutaneous melanoma: A Mendelian randomization study.

Zhang M, Wang J, Huo R, Liang Q, Liu J Medicine (Baltimore). 2024; 103(18):e38050.

PMID: 38701275 PMC: 11062689. DOI: 10.1097/MD.0000000000038050.

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