Abstract
BACKGROUND: Few studies have reported the clinical features of patients with coronavirus disease 2019 (COVID-19) who were treated with biologics for severe asthma (SA). OBJECTIVE: We sought to elucidate the clinical features and mutual interaction between COVID-19 and SA in terms of disease severity during the Omicron epidemic. METHODS: A retrospective study among patients with SA who received any biologic therapy from January 2022 to February 2023 at Jikei University Hospital (Tokyo, Japan) was performed. RESULTS: Among 99 patients with SA, 22 women and 6 men suffered from COVID-19, and 1 woman was reinfected. The severity of COVID-19 was mild in 26 cases and moderate in 3 cases. The number of vaccinations among patients with mild COVID-19 was significantly higher than that among patients with moderate COVID-19 (3.0 ± 1.4 vs 1.0 ± 1.0; P = .03). Asthmatic exacerbations were mild in 9 cases and moderate in 7 cases. The severity of asthmatic exacerbations was significantly associated with the Asthma Control Test score at baseline (no/mild/moderate exacerbation = 23.0 ± 2.3/18.1 ± 5.3/15.0 ± 4.3; P = .004; Kruskal-Wallis test). By means of a multivariate logistic regression analysis, a lower number of vaccinations was a significant risk factor for COVID-19 progression (odds ratio, 0.64; 95% CI, 0.46-0.91; P = .006). CONCLUSIONS: During the Omicron epidemic, the onset and severity of COVID-19 were related to the number of vaccinations, and the severity of asthmatic exacerbations caused by COVID-19 was associated with the Asthma Control Test score at baseline and the number of vaccinations but not with the use of biologics.