Convalescent plasma for hospitalized patients with COVID-19: an open-label, randomized controlled trial Journal Articles uri icon

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abstract

  • AbstractThe efficacy of convalescent plasma for coronavirus disease 2019 (COVID-19) is unclear. Although most randomized controlled trials have shown negative results, uncontrolled studies have suggested that the antibody content could influence patient outcomes. We conducted an open-label, randomized controlled trial of convalescent plasma for adults with COVID-19 receiving oxygen within 12 d of respiratory symptom onset (NCT04348656). Patients were allocated 2:1 to 500 ml of convalescent plasma or standard of care. The composite primary outcome was intubation or death by 30 d. Exploratory analyses of the effect of convalescent plasma antibodies on the primary outcome was assessed by logistic regression. The trial was terminated at 78% of planned enrollment after meeting stopping criteria for futility. In total, 940 patients were randomized, and 921 patients were included in the intention-to-treat analysis. Intubation or death occurred in 199/614 (32.4%) patients in the convalescent plasma arm and 86/307 (28.0%) patients in the standard of care arm—relative risk (RR) = 1.16 (95% confidence interval (CI) 0.94–1.43,P = 0.18). Patients in the convalescent plasma arm had more serious adverse events (33.4% versus 26.4%; RR = 1.27, 95% CI 1.02–1.57,P = 0.034). The antibody content significantly modulated the therapeutic effect of convalescent plasma. In multivariate analysis, each standardized log increase in neutralization or antibody-dependent cellular cytotoxicity independently reduced the potential harmful effect of plasma (odds ratio (OR) = 0.74, 95% CI 0.57–0.95 and OR = 0.66, 95% CI 0.50–0.87, respectively), whereas IgG against the full transmembrane spike protein increased it (OR = 1.53, 95% CI 1.14–2.05). Convalescent plasma did not reduce the risk of intubation or death at 30 d in hospitalized patients with COVID-19. Transfusion of convalescent plasma with unfavorable antibody profiles could be associated with worse clinical outcomes compared to standard care.

authors

  • Bégin, Philippe
  • Callum, Jeannie
  • Jamula, Erin
  • Cook, Richard
  • Heddle, Nancy
  • Tinmouth, Alan
  • Zeller, Michelle
  • Beaudoin-Bussières, Guillaume
  • Amorim, Luiz
  • Bazin, Renée
  • Loftsgard, Kent Cadogan
  • Carl, Richard
  • Chassé, Michaël
  • Cushing, Melissa M
  • Daneman, Nick
  • Devine, Dana V
  • Dumaresq, Jeannot
  • Fergusson, Dean A
  • Gabe, Caroline
  • Glesby, Marshall J
  • Li, Na
  • Liu, Yang
  • McGeer, Allison
  • Robitaille, Nancy
  • Sachais, Bruce S
  • Scales, Damon C
  • Schwartz, Lisa
  • Shehata, Nadine
  • Turgeon, Alexis F
  • Wood, Heidi
  • Zarychanski, Ryan
  • Finzi, Andrés
  • Marceau, Danièle
  • Huang, Andy
  • Carr, Holly
  • Lin, Yulia
  • Lall, Rosemarie
  • Graham, Christopher
  • Arsenault, Christine
  • Sales, Valerie
  • Sidhu, Davinder
  • Semret, Makeda
  • Hamm, Caroline
  • Arhanchiague, Eneko
  • Solh, Ziad
  • Srour, Nadim
  • Soliman, Karim
  • Yee, Colin
  • Laroche, Vincent
  • Nahirniak, Susan
  • Greenaway, Christina
  • Pai, Menaka
  • Côté, Andréanne
  • Tsang, Jennifer
  • Cserti-Gazdewich, Christine
  • Talbot, Danielle
  • Poulin, Sébastien
  • Guimaraes, Rodrigo
  • Rushton-Marovac, Moira
  • Langlois, Alexandra
  • Ning, Shuoyan
  • Shih, Andrew
  • Boileau, Mélissa
  • Singh, Harjot
  • Ledingham, Donna
  • Ponnampalam, Arjuna
  • Yan, Matthew
  • Prokopchuk-Gauk, Oksana
  • Poirier, André
  • Girouard, Gabriel
  • Pavenski, Katerina
  • Drouin, Olivier
  • Harris, David
  • Durand, Madeleine
  • Rimmer, Emily
  • Ovakim, Daniel
  • Ménard, François
  • Cuccarolo, Glenna
  • Carruthers, Julie
  • Lucier, Kayla
  • Arsenault, Valérie
  • Auclair, Marie-Christine
  • Avram, Meda
  • Brassard, Michael
  • Cerro, Sabrina
  • Martinez, Véronica
  • Morin, Julie
  • Saint-Jacques, Marie
  • Veillette, Maxime
  • Armali, Chantal
  • Kron, Amie
  • Modi, Dimpy
  • Duncan, Joanne
  • Justumus, Pauline
  • John, Melanie St
  • St-Onge, Geneviève
  • Hadzi-Tosev, Milena
  • Dion, Pierre-Marc
  • McGillivary, Lawrence
  • de Moulliac, Andre Valleteau
  • Nyman, Sheila A
  • Perilli, Stephanie
  • Van Vliet, Paulette Jean
  • Lane, Shannon
  • Pavenski, Katerina
  • Pereira, Rebecca
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  • Resso, Gianna
  • Rosario, Roxanne
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  • Flores, Lina
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  • Shin, Christine
  • Steed, Tony
  • Ward, Rachel
  • Allard, Isabelle
  • Germain, Marc
  • Girard, Sébastien
  • Parent, Éric
  • Pigeon, Claudia-Mireille
  • Lopes, Maria Esther
  • Pêcego, Margarida
  • Rosario, Natalia
  • da Costa Silva, Carlos Alexandre
  • Oliveira, Thais
  • Lopes, Maria Cristina
  • Mateos, Sheila
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  • Arnold, Donald M

publication date

  • November 2021