[Corticoid treatment and SARS-CoV-2 variants: two independent factors associated with COVID-19 mortality in a Spanish regional hospital].

Background: Pandemic inter-wave hospital admissions and COVID-19-related mortality rates vary greatly. Some of the factors that may be playing part in this are the profile of the patients, viral variants, pharmacological treatments, or preventive measures. This work aimed to analyze the factors associated with mortality in COVID-19 patients admitted to hospital during 2020-2021.