RT Journal Article SR Electronic T1 Cost-effectiveness of remdesivir plus usual care versus usual care alone for hospitalized patients with COVID-19: an economic evaluation as part of the Canadian Treatments for COVID-19 (CATCO) randomized clinical trial JF CMAJ Open JO CMAJ FD Canadian Medical Association SP E807 OP E817 DO 10.9778/cmajo.20220077 VO 10 IS 3 A1 Vincent I. Lau A1 Robert Fowler A1 Ruxandra Pinto A1 Alain Tremblay A1 Sergio Borgia A1 François M. Carrier A1 Matthew P. Cheng A1 John Conly A1 Cecilia T. Costiniuk A1 Peter Daley A1 Erick Duan A1 Madeleine Durand A1 Patricia S. Fontela A1 George Farjou A1 Mike Fralick A1 Anna Geagea A1 Jennifer Grant A1 Yoav Keynan A1 Kosar Khwaja A1 Nelson Lee A1 Todd C. Lee A1 Rachel Lim A1 Conar R. O’Neil A1 Jesse Papenburg A1 Makeda Semret A1 Michael Silverman A1 Wendy Sligl A1 Ranjani Somayaji A1 Darrell H.S. Tan A1 Jennifer L.Y. Tsang A1 Jason Weatherald A1 Cedric Philippe Yansouni A1 Ryan Zarychanski A1 Srinivas Murthy A1 , YR 2022 UL http://www.cmajopen.ca/content/10/3/E807.abstract AB Background: The role of remdesivir in the treatment of hospitalized patients with COVID-19 remains ill-defined. We conducted a cost-effectiveness analysis alongside the Canadian Treatments for COVID-19 (CATCO) open-label, randomized clinical trial evaluating remdesivir.Methods: Patients with COVID-19 in Canadian hospitals from Aug. 14, 2020, to Apr. 1, 2021, were randomly assigned to receive remdesivir plus usual care versus usual care alone. Taking a public health care payer’s perspective, we collected in-hospital outcomes and health care resource utilization alongside estimated unit costs in 2020 Canadian dollars over a time horizon from randomization to hospital discharge or death. Data from 1281 adults admitted to 52 hospitals in 6 Canadian provinces were analyzed.Results: The total mean cost per patient was $37 918 (standard deviation [SD] $42 413; 95% confidence interval [CI] $34 617 to $41 220) for patients randomly assigned to the remdesivir group and $38 026 (SD $46 021; 95% CI $34 480 to $41 573) for patients receiving usual care (incremental cost −$108 [95% CI −$4953 to $4737], p > 0.9). The difference in proportions of in-hospital deaths between remdesivir and usual care groups was −3.9% (18.7% v. 22.6%, 95% CI −8.3% to 1.0%, p = 0.09). The difference in proportions of incident invasive mechanical ventilation events between groups was −7.0% (8.0% v. 15.0%, 95% CI −10.6% to −3.4%, p = 0.006), whereas the difference in proportions of total mechanical ventilation events between groups was −5.7% (16.4% v. 22.1%, 95% CI −10.0% to −1.4%, p = 0.01). Remdesivir was the dominant intervention (but only marginally less costly, with mildly lower mortality) with an incalculable incremental cost effectiveness ratio; we report results of incremental costs and incremental effects separately. For willingness-to-pay thresholds of $0, $20 000, $50 000 and $100 000 per death averted, a strategy using remdesivir was cost-effective in 60%, 67%, 74% and 79% of simulations, respectively. The remdesivir costs were the fifth highest cost driver, offset by shorter lengths of stay and less mechanical ventilation.Interpretation: From a health care payer perspective, treating patients hospitalized with COVID-19 with remdesivir and usual care appears to be preferrable to treating with usual care alone, albeit with marginal incremental cost and small clinical effects. The added cost of remdesivir was offset by shorter lengths of stay in the intensive care unit and less need for ventilation. Study registration: ClinicalTrials. gov, no. NCT04330690