Asthma in COVID-19 suspected and diagnosed patients.

Abstract Background Asthma patients are comparatively susceptible to respiratory viral infections and more likely to develop severe symptoms than people without asthma. During the coronavirus disease 2019 (COVID-19) pandemic, it is necessary to adequately evaluate the characteristics and outcomes of the asthma population in the COVID-19 tested and diagnosed population. Objective We performed a study to assess the impact of asthma on COVID-19 diagnosis, presenting symptoms, disease severity, and cytokine profiles. Methods This was an analysis of a prospectively collected cohort of patients suspected of having COVID-19 who presented for COVID-19 testing at a tertiary medical center in Missouri, USA between March and September 2020. We classified and analyzed patients according to their preexisting asthma diagnosis and subsequent COVID-19 testing results. Results COVID-19 suspected patients (n=435) were enrolled in this study. The proportion of patients testing positive for COVID-19 was 69.2% and 81.9% in the asthma and non-asthma groups respectively. The frequency of relevant symptoms are similar between asthma groups with positive and negative COVID-19 test results. In the COVID-19 diagnosed population (n=343), asthma was not associated with several indicators of COVID-19 severity, including hospitalization, admission to an intensive care unit (ICU), mechanical ventilation, death due to COVID-19, and in-hospital mortality after multivariate adjustment. COVID-19 patients with asthma exhibited significantly lower levels of plasma interleukin (IL)-8 compared to patients without asthma (adjusted p=0.023). Conclusion The asthma population is facing a challenge in preliminary COVID-19 evaluation due to overlap in symptoms of COVID-19 and asthma. However, asthma does not increase the risk of COVID-19 severity if infected.