Effect of anakinra on mortality in patients with COVID-19: a systematic review and patient-level meta-analysis

International Collaborative Group for Anakinra in COVID-19, Evdoxia Kyriazopoulou, Thomas Huet, Giulio Cavalli, Andrea Gori, Miltiades Kyprianou, Peter Pickkers, Jesper Eugen-Olsen, Mario Clerici, Francisco Veas, Gilles Chatellier, Gilles Kaplanski, Mihai G. Netea, Emanuele Pontali, Marco Gattorno, Raphael Cauchois, Emma Kooistra, Matthijs Kox, Alessandra Bandera, Hélène BeaussierDavide Mangioni, Lorenzo Dagna, Jos W.M. van der Meer, Evangelos J. Giamarellos-Bourboulis, Gilles Hayem, Stefano Volpi, Maria Pia Sormani, Giorgio Bozzi, Francesca Minoia, Stefano Aliberti, Giacomo Grasselli, Laura Alagna, Carlo Agostoni, Francesco Blasi, Giorgio Costantino, Anna Ludovica Fracanzani, Nicola Montano, Flora Peyvandi, Antonio Muscatello, Giovanni Filocamo, Massimo Fantoni, Antonella Cingolani, Andrea Angheben, Chiara Simona Cardellino, Emanuele Nicastri, Giuseppe Ippolito, Matteo Bassetti, Carlo Selmi

Research output: Contribution to journalArticlepeer-review


Background: Anakinra might improve the prognosis of patients with moderate to severe COVID-19 (ie, patients requiring oxygen supplementation but not yet receiving organ support). We aimed to assess the effect of anakinra treatment on mortality in patients admitted to hospital with COVID-19. Methods: For this systematic review and individual patient-level meta-analysis, a systematic literature search was done on Dec 28, 2020, in Medline (PubMed), Cochrane, medRxiv, bioRxiv, and the ClinicalTrials.gov databases for randomised trials, comparative studies, and observational studies of patients admitted to hospital with COVID-19, comparing administration of anakinra with standard of care, or placebo, or both. The search was repeated on Jan 22, 2021. Individual patient-level data were requested from investigators and corresponding authors of eligible studies; if individual patient-level data were not available, published data were extracted from the original reports. The primary endpoint was mortality after 28 days and the secondary endpoint was safety (eg, the risk of secondary infections). This study is registered on PROSPERO (CRD42020221491). Findings: 209 articles were identified, of which 178 full-text articles fulfilled screening criteria and were assessed. Aggregate data on 1185 patients from nine studies were analysed, and individual patient-level data on 895 patients were provided from six of these studies. Eight studies were observational and one was a randomised controlled trial. Most studies used historical controls. In the individual patient-level meta-analysis, after adjusting for age, comorbidities, baseline ratio of the arterial partial oxygen pressure divided by the fraction of inspired oxygen (PaO2/FiO2), C-reactive protein (CRP) concentrations, and lymphopenia, mortality was significantly lower in patients treated with anakinra (38 [11%] of 342) than in those receiving standard of care with or without placebo (137 [25%] of 553; adjusted odds ratio [OR] 0·32 [95% CI 0·20–0·51]). The mortality benefit was similar across subgroups regardless of comorbidities (ie, diabetes), ferritin concentrations, or the baseline PaO2/FiO2. In a subgroup analysis, anakinra was more effective in lowering mortality in patients with CRP concentrations higher than 100 mg/L (OR 0·28 [95% CI 0·17–0·47]). Anakinra showed a significant survival benefit when given without dexamethasone (OR 0·23 [95% CI 0·12–0·43]), but not with dexamethasone co-administration (0·72 [95% CI 0·37–1·41]). Anakinra was not associated with a significantly increased risk of secondary infections when compared with standard of care (OR 1·35 [95% CI 0·59–3·10]). Interpretation: Anakinra could be a safe, anti-inflammatory treatment option to reduce the mortality risk in patients admitted to hospital with moderate to severe COVID-19 pneumonia, especially in the presence of signs of hyperinflammation such as CRP concentrations higher than 100 mg/L. Funding: Sobi.
Original languageEnglish
Pages (from-to)e690-e697
JournalThe Lancet Rheumatology
Issue number10
Publication statusPublished - Oct 2021


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