Real World Experience with Regdanvimab Treatment of Mild-toModerate Coronavirus Disease-19 in a COVID-19 Designated Hospital of Korea / 감염과화학요법

ABSTRACT

Background@#Real-world clinical data concerning regdanvimab, a monoclonal antibody treatment for patients with mild-to-moderate coronavirus disease 2019 (COVID-19), are urgently needed. Here, we describe our experience with regdanvimab. @*Materials and Methods@#This retrospective cohort study enrolled high-risk adults with mild-to-moderate COVID-19 who were admitted to a dedicated COVID-19 hospital in Korea from March to September 2021. We used multiple logistic regression and propensity scorematching to compare the outcomes of patients who did or did not receive regdanvimab. The primary outcome was in-hospital progression to severe or critical status, or death. @*Results@#Of 586 patients eligible for regdanvimab, 256 patients who received regdanvimab and 251 untreated patients were included. The median age was 66 years and 47.5% were men. The most common underlying illnesses were hypertension (53.8%) and diabetes (36.9%). Patients were admitted to the hospital at a median of 2 days after symptom onset; regdanvimab was administered at a median of 3 days after symptom onset. Multivariate analysis indicated that regdanvimab significantly reduced the risk of disease progression during hospitalization [odds ratio (OR) 0.285; 95% confidence interval (CI) 0.144 - 0.564].In a 11 propensity score-matched cohort (172 patients in either group), regdanvimab also decreased the risk of progression (OR 0.162; 95% CI 0.068 - 0.386). @*Conclusion@#In high-risk patients with mild-to-moderate COVID-19, regdanvimab decreased the risk of progression to severe COVID-19.