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Phenotypic characteristics and prognosis of inpatients with COVID-19 and diabetes: the CORONADO study – published online 29/05/2020

Bertrand Cariou, Samy Hadjadj, Matthieu Wargny, Matthieu Pichelin, Abdallah Al-Salameh, Ingrid Allix, Coralie Amadou, Gwénaëlle Arnault, Florence Baudoux, Bernard Bauduceau, Sophie Borot, Muriel Bourgeon-Ghittori, Olivier Bourron, David Boutoille, France Cazenave-Roblot, Claude Chaumeil, Emmanuel Cosson, Sandrine Coudol, Patrice Darmon, Emmanuel Disse, Amélie Ducet-Boiffard, Bénédicte Gaborit, Michael Joubert, Véronique Kerlan, Bruno Laviolle, Lucien Marchand, Laurent Meyer, Louis Potier, Gaëtan Prevost, Jean-Pierre Riveline, René Robert, Pierre-Jean Saulnier, Ariane Sultan, Jean-François Thébaut, Charles Thivolet, Blandine Tramunt, Camille Vatier, Ronan Roussel, Jean-François Gautier, Pierre Gourdy, for the CORONADO investigators

Diabetes has been shown to be a major comorbidity that affects the severity of Coronavirus disease-2019 (COVID-19). However, precise data regarding diabetes characteristics and their prognostic relevance in inpatients with COVID-19 are still lacking. In this issue, Cariou, Hadjadj, Wargny et al (https://doi.org/10.1007/s00125-020-05180-x) report the first results from the Coronavirus SARS-CoV-2 and Diabetes Outcomes (CORONADO) study, an observational, multicentric (68 centres), French nationwide study. With a prespecified design and protocol, the CORONADO study aims to explore the phenotypes of diabetic individuals with COVID-19. The authors found that patients with diabetes requiring hospital admission for COVID-19 were more likely to be elderly (mean age, 70 years; 38% ≥75 years old) and male (65%), and more commonly had type 2 (90%) than type 1 diabetes (3%). One in ten patients (10.3%) died by day 7 following hospital admission; age and advanced diabetic complications were independently associated with mortality on day 7 of admission. Thus, people with this profile should follow all rules to avoid infection with severe acute respiratory syndrome Coronavirus-2 (SARS-CoV-2). In addition, severe forms of COVID-19 were associated with macrovascular complications, as indicated previously, and also microvascular complications, as established for the first time by this study. Long-term glycaemic control (HbA1c) showed no obvious association with prognosis; however, increased BMI appeared to be an independent prognostic factor for COVID-19 severity and, hence, the authors suggest that individuals with a high BMI require special attention.

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