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0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ Mortality -200% Improvement Relative Risk Mortality (b) 60% Progression 45% Progression (b) 50% c19regn.com/suzuki.html Favors casiri/imdevimab Favors control
21 December 2021 - Early treatment study
Real-world clinical outcomes of treatment with casirivimab-imdevimab among patients with mild-to-moderate coronavirus disease 2019 during the Delta variant pandemic
Suzuki et al., medRxiv, doi:10.1101/2021.12.19.21268078 (Preprint)
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Retrospective 949 patients in Japan, 314 treated with casirivimab/imdevimab showing significantly lower risk of deterioration with treatment.
risk of death, 200.0% higher, RR 3.00, p = 1.00, treatment 1 of 222 (0.5%), control 0 of 222 (0.0%), continuity correction due to zero event (with reciprocal of the contrasting arm), propensity score matching.
risk of death, 59.6% lower, RR 0.40, p = 0.67, treatment 1 of 314 (0.3%), control 5 of 635 (0.8%), NNT 213, unadjusted.
risk of progression, 45.2% lower, RR 0.55, p = 0.02, treatment 17 of 222 (7.7%), control 31 of 222 (14.0%), NNT 16, propensity score matching.
risk of progression, 49.9% lower, RR 0.50, p = 0.002, treatment 34 of 314 (10.8%), control 70 of 365 (19.2%), NNT 12, odds ratio converted to relative risk, multivariate.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
Suzuki et al., 12/21/2021, retrospective, Japan, Asia, preprint, 49 authors, study period 24 July, 2021 - 30 September, 2021.
Contact: shibatay@fmu.ac.jp.
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