Introduction: A growing evidence suggests that immune dysregulation and thrombotic phenomena are key features in the pathophysiology of COVID-19. Apart from antivirals and respiratory support, anticoagulants, corticoids and immunomodulators are increasingly being prescribed, especially for more severe cases. We describe the clinical outcome of a large cohort of patients preferentially treated with glucocorticoids and interleukin inhibitors. Methods: Single center and retrospective case series. Adult patients admitted with COVID-19 related respiratory insufficiency were included. Patients who died within 2 days after admission and those testing positive but asymptomatic were excluded. We defined two study periods: from March 3rd to March 31 st, 2020 (beginning of epidemic until peak of incidence) and April 1 st to May 7 th, 2020 (second half of epidemic). The majority of patients received respiratory support, combinations of antimicrobials, anticoagulants, corticoids and interleukin inhibitors. Antivirals were preferentially given in the first period. The clinical outcome (death and ventilator dependency) of both periods was compared. Results: From March 3 rd to May 7 th, 685 patients were included for analysis (58.4% males, mean age 68.9 years). Patients in the first period (n = 408) were younger (66.6 vs 71.1 years, p = 0.003), presented lower mean P a O 2/F i O2 ratio at admission (256.5 vs 270.4 mm Hg,p = 0.0563), higher ferritin (1520 vs 1221 ng/ml, p = 0.01), higher IL-6 (679 vs 194 pg/ml, p
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