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Effectiveness of Regdanvimab Treatment in High-Risk COVID-19 Patients to Prevent Progression to Severe Disease
Ji Yeon Lee1, Jee Young Lee2, Jae-Hoon Ko3
1Division of Infectious Diseases, Department of Internal Medicine, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea.
Insights
Regdanvimab, a monoclonal antibody, significantly reduced the risk of progression to severe coronavirus 2019 (COVID-19) in mild cases. This treatment also decreased the need for oxygen supplementation in hospitalized patients.
Area of Science:
- Immunology
- Infectious Diseases
- Clinical Medicine
Background:
- Coronavirus 2019 (COVID-19) poses a significant global health challenge.
- Identifying effective treatments for COVID-19, particularly for patients at risk of progression, is crucial.
- Monoclonal antibodies have emerged as a therapeutic option for viral infections.
Purpose of the Study:
- To evaluate the clinical effectiveness of regdanvimab, a monoclonal antibody, in treating patients with mild COVID-19.
- To assess the impact of regdanvimab on disease progression and the need for respiratory support.
Main Methods:
- A retrospective cohort study involving 778 mild COVID-19 patients was conducted.
- Patients were classified into regdanvimab and supportive care groups.
- Multivariate analyses were performed on total and propensity score-matched cohorts to assess disease progression.
Main Results:
- Regdanvimab treatment was associated with significantly lower rates of oxygen supplementation (8.1% vs 18.4%) and progression to severe disease (2.1% vs 9.6%) compared to supportive care.
- Multivariate analysis confirmed a reduced risk for progression to severe disease in both total (HR 0.262) and PS-matched (HR 0.176) cohorts.
- Low SpO2 and elevated CRP were identified as risk factors for disease progression.
Conclusions:
- Regdanvimab treatment demonstrated clinical effectiveness in reducing the risk of progression to severe COVID-19 in mild cases.
- The findings support the use of regdanvimab as a therapeutic option for high-risk COVID-19 patients.
- Further research may explore optimal timing and patient selection for regdanvimab therapy.
Objective:
To evaluate clinical effectiveness of regdanvimab, a monoclonal antibody agent for treating coronavirus 2019 (COVID-19).
Methods:
A retrospective cohort study was conducted at two general hospitals during the study period of December 2020 to May 2021. Mild COVID-19 patients with risk factors for disease progression admitted to the hospitals within seven days of symptom onset were enrolled and followed until discharge or referral. Multivariate analyses for disease progression were conducted in the total and propensity score (PS)-matched cohorts.
Results:
A total of 778 mild COVID-19 patients were included and classified as the regdanvimab (n = 234) and supportive care (n = 544) groups. Significantly fewer patients required O2 supplementation via nasal prong in the regdanvimab group (8.1%) than in the supportive care group (18.4%, P < 0.001). The decreased risk for O2 support by regdanvimab treatment was noticed in the multivariate analysis of the total cohort (HR 0.570, 95% CI 0.343-0.946, P = 0.030), but it was not statistically significant in the PS-matched cohort (P = 0.057). Progression to severe disease was also significantly lower in the regdanvimab group (2.1%) than in the supportive care group (9.6%, P < 0.001). The significantly reduced risk for progression to severe disease by regdanvimab treatment was observed in the analysis of both the total cohort (HR 0.262, 95% CI 0.103-0.667, P = 0.005) and PS-matched cohort (HR 0.176, 95% CI 0.060-0.516, P = 0.002). Potential risk factors for progression were investigated in the supportive care group and SpO2 < 97% and CRP elevation >1.5 mg/dL were common risk factors for O2 support and progression to severe disease. Among the patients with any of these factors, regdanvimab treatment was associated with decreased risk for progression to severe disease with slightly lower HR (HR 0.202, 95% CI 0.062-0.657, P = 0.008) than that of the total cohort.
Conclusion:
Regdanvimab treatment was associated with a decreased risk of progression to severe disease.
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