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Home   COVID-19 treatment studies for Casirivimab/imdevimab  COVID-19 treatment studies for Casirivimab/i..  C19 studies: Casirivimab/i..  Casirivimab/i..   Select treatmentSelect treatmentTreatmentsTreatments
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0 0.5 1 1.5 2+ Mortality 98% Improvement Relative Risk Hospitalization 91% c19regn.com Webb et al. Casirivimab/i.. for COVID-19 EARLY Favors casirivimab/im.. Favors control
Webb, 5,651 patient casirivimab/imdevimab early treatment study: 91% lower hospitalization [p=0.0003] https://c19p.org/webb2
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Real-World Effectiveness and Tolerability of Monoclonal Antibody Therapy for Ambulatory Patients with Early COVID-19
Webb et al., Open Forum Infectious Diseases, doi:10.1093/ofid/ofab331
23 Jun 2021    Source   PDF   Share   Tweet
Retrospective 115 patients treated with casirivimab/imdevimab showing lower mortality, hospital admission, and emergency department visits with treatment. Authors falsely state that "no other COVID-19 therapies for ambulatory patients have proven effective".
Efficacy is variant dependent. Unlikely to be effective for omicron [Liu, Sheward, Tatham, VanBlargan].
risk of death, 98.3% lower, RR 0.02, p = 0.63, treatment 0 of 115 (0.0%), control 57 of 5,536 (1.0%), NNT 97, relative risk is not 0 because of continuity correction due to zero events (with reciprocal of the contrasting arm).
risk of hospitalization, 91.1% lower, RR 0.09, p < 0.001, treatment 1 of 115 (0.9%), control 538 of 5,536 (9.7%), NNT 11.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Webb et al., 6/23/2021, retrospective, USA, North America, peer-reviewed, 14 authors.
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