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We read with great interest the letter by Kawada in which the studies assessing colchicine as a treatment for COVID-19 were reviewed.1 Given its known inhibitory effect on NACHT-LRRPYD-containing protein 3 inflammasome2 and its possible antiviral properties,2 colchicine was hypothesised as a candidate therapy for COVID-19 since the very beginning of the pandemic.3 4 To the best of our knowledge, our observational retrospective study5 reported on the largest number of patients with COVID-19 treated with colchicine (122 consecutive patients), and they were compared with a control group treated with the Standard of Care (SoC, 140 consecutive patients).5 Kawada underlined the effectiveness of colchicine in reducing mortality and the need for non-invasive ventilation, as shown by different studies.5–7 After the hospital discharge, we observed additional deaths in patients treated with colchicine and in those treated with SoC (p=0.25). The long-term analysis of our cohort confirmed the original description of improved survival for patients treated with colchicine (mortality rate at 270 days: colchicine 20% vs SoC 44%; p=0.0001). We would like to point out the statement by Kawada reporting that ferritin and arterial oxygen tension (or pressure) (PaO …
Handling editor Josef S Smolen
Twitter @piantoni_silvia, @lauraandreoli80
Contributors I confirm that all the authors have approved the manuscript, which is original and not accepted for publication elsewhere.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.
Provenance and peer review Commissioned; internally peer reviewed.