Trial reportClinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases2025
Long-term outcomes of passive immunotherapy for COVID-19: a pooled analysis of a large multinational platform randomized clinical trial.
Trial report in Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04501978 (A Multicenter, Adaptive, Randomized, Blinded Controlled Trial of the Safety and Efficacy of Investigational Therapeutics for Hospitalized Patients With COVID-19), which is not on this map. Not yet cited in PubMed.
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A Multicenter, Adaptive, Randomized, Blinded Controlled Trial of the Safety and Efficacy of Investigational Therapeutics for Hospitalized Patients With COVID-19
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0 citing papers in PubMed.
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Authors and funding
31 authors.
Funding
Abstract
objectivesPassive immunotherapy, including monoclonal antibodies and neutralizing proteins, was used for the treatment of patients with COVID-19 during the pandemic. Accelerating COVID-19 Therapeutic Interventions and Vaccines-Therapeutics for Inpatients with COVID-19 (ACTIV-3/TICO) was a multinational, randomized placebo-controlled platform trial that evaluated the effectiveness of multiple passive immunotherapy agents in patients hospitalized with COVID-19. Given the long half-life of some agents studied, participants were followed for an extended period to assess the long-term efficacy and sustained safety of these agents.
methodsWe conducted a pooled analysis of individual participant data from four trials of ACTIV-3/TICO: sotrovimab, amubarvimab-romlusevimab, tixagevimab-cilgavimab, and ensovibep. Cox proportional hazards models were conducted to compare time to mortality and time to mortality or rehospitalization between participants receiving active agents vs. placebo through 18 months.
resultsA total of 2311 participants were enrolled between 16 December 2020 and 15 November 2021. Overall, 56.9% (1315/2311) received an active agent and 77.2% (1784/2311) of participants were unvaccinated for SARS-CoV-2. Median duration between symptom onset and enrolment was 8 days (interquartile range, 6-10), and most participants received remdesivir (92.1% [2129/2311]) and corticosteroids (70.4% [1627/2311]) before enrolment. There was no difference in mortality across all active (11.9% [157/1315]) vs. placebo (14.0% [139/996]) arms (hazard ratio, 0.87; 95% CI, 0.70-1.08). Furthermore, there was no difference in combined mortality or rehospitalization across all active (31.7% [417/1315]) vs. placebo (32.1% [320/996]) arms (hazard ratio, 0.96; 95% CI, 0.84-1.10). DISCUSSION: In our large study of long half-life passive immunotherapy for hospitalized patients with COVID-19, we did not find evidence of a long-term effect on either mortality or rehospitalization.
trial registrationNCT04501978.
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