巴西葡萄牙圣保罗慈善医院Viviane C Veiga团队研究了托珠单抗对严重或危重Covid-19患者15天临床转归的影响。2021年1月20日，该研究发表在《英国医学杂志》上。
Title: Effect of tocilizumab on clinical outcomes at 15 days in patients with severe or critical coronavirus disease 2019: randomised controlled trial
Author: Viviane C Veiga, Joo A G G Prats, Danielle L C Farias, Regis G Rosa, Leticia K Dourado, Fernando G Zampieri, Flávia R Machado, Renato D Lopes, Otavio Berwanger, Luciano C P Azevedo, álvaro Avezum, Thiago C Lisboa, Salomón S O Rojas, Juliana C Coelho, Rodrigo T Leite, Júlio C Carvalho, Luis E C Andrade, Alex F Sandes, Maria C T Pinto, Claudio G Castro, Sueli V Santos, Thiago M L de Almeida, André N Costa, Otávio C E Gebara, Flávio G Rezende de Freitas, Eduardo S Pacheco, David J B Machado, Josiane Martin, Fábio G Conceio, Suellen R R Siqueira, Lucas P Damiani, Luciana M Ishihara, Daniel Schneider, Denise de Souza, Alexandre B Cavalcanti, Phillip Scheinberg
Objective To determine whether tocilizumab improves clinical outcomes for patients with severe or critical coronavirus disease 2019 (covid-19).
Design Randomised, open label trial.
Setting Nine hospitals in Brazil, 8 May to 17 July 2020.
Participants Adults with confirmed covid-19 who were receiving supplemental oxygen or mechanical ventilation and had abnormal levels of at least two serum biomarkers (C reactive protein, D dimer, lactate dehydrogenase, or ferritin). The data monitoring committee recommended stopping the trial early, after 129 patients had been enrolled, because of an increased number of deaths at 15 days in the tocilizumab group.
Interventions Tocilizumab (single intravenous infusion of 8 mg/kg) plus standard care (n=65) versus standard care alone (n=64).
Main outcome measure The primary outcome, clinical status measured at 15 days using a seven level ordinal scale, was analysed as a composite of death or mechanical ventilation because the assumption of odds proportionality was not met.
Results A total of 129 patients were enrolled (mean age 57 (SD 14) years; 68% men) and all completed follow-up. All patients in the tocilizumab group and two in the standard care group received tocilizumab. 18 of 65 (28%) patients in the tocilizumab group and 13 of 64 (20%) in the standard care group were receiving mechanical ventilation or died at day 15 (odds ratio 1.54, 95% confidence interval 0.66 to 3.66; P=0.32). Death at 15 days occurred in 11 (17%) patients in the tocilizumab group compared with 2 (3%) in the standard care group (odds ratio 6.42, 95% confidence interval 1.59 to 43.2). Adverse events were reported in 29 of 67 (43%) patients who received tocilizumab and 21 of 62 (34%) who did not receive tocilizumab.
Conclusions In patients with severe or critical covid-19, tocilizumab plus standard care was not superior to standard care alone in improving clinical outcomes at 15 days, and it might increase mortality.