The Impact of Comorbid Allergic Airway Disease on the Severity and Mortality of COVID-19: a Systematic Review and Meta-analysis
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Purpose: To analyze the impact of AAD on the severity and mortality of COVID-19 patients and compare clinical outcomes between patients with and without AAD.
Methods: In the systematic review and meta-analysis, we searched PubMed, Embase, Web of Science for studies reporting allergic rhinitis, asthma prevalence in COVID-19 patients and compared clinical outcomes, and excluded duplicate publications, reviews, comments, single or few cases reports (< 100 cases). We determined the pooled effect estimates using random effect model.
Results: Thirty-four studies (345,091) were finally included for the meta-analysis. On the basis of 32 studies (337,821) involving with the severity of COVID-19, we did not find significant association between AAD and the severity of COVID-19 (p = 0.35, OR 1.10, 95% CI 0.90-1.35). Subgroup analysis indicated there was no the variability in the prevalence of AAD among COVID-19 patients in different study designs, disease categories, countries, the definition of severity, and population size of AAD. Based on 21 studies (306,331) involving with the mortality of COVID-19, AAD was significantly associated with the decreased mortality of COVID-19 (p < 0.05, OR 0.83, 95% CI 0.70-0.99). The subgroup analysis showed AAD was not associated with the mortality of COVID-19 in different countries or regions. Based on the population size of AAD, we found AAD within 100 cases was not associated with the mortality of COVID-19 (p = 0.63, OR 1.15, 95% CI 0.65-2.03). Moreover, study design was possible heterogeneity source as the heterogeneity I was reduced to 0 in prospective studies.
Conclusion: The preexisting AAD was not inclined to deteriorate the course of COVID-19. The prevalence of AAD was not associated with the severity of COVD-19 patients and inclined to be significantly associated with the decreased mortality risk of COVID-19.
Choi H, Kim J, An Y, Park M, Wee J J Clin Med. 2022; 11(15).
PMID: 35893358 PMC: 9331054. DOI: 10.3390/jcm11154266.
Bhattarai A, Dhakal G, Shah S, Subedi A, Sah S, Mishra S Interdiscip Perspect Infect Dis. 2022; 2022:8508489.
PMID: 35677466 PMC: 9168826. DOI: 10.1155/2022/8508489.