PRactice of VENTilation in Patients With ARDS Due to COVID-19 vs Pneumonia

This study aims to compare epidemiology, management of invasive ventilation and outcomes in critically ill patients with COVID-19 ARDS and ARDS from another pulmonary infection. The investigators will use individual patient data from four recently published large observational COVID-9 studies, including the 'Practice of VENTilation in COVID-19 patients' (PRoVENT-COVID) study, the 'Epidemiology of COVID-19 patients in the ICU' (EPICCoV) study, the 'SATI-COVID-19 - Clinical Characteristics and Outcomes of Patients With COVID-19 on Mechanical Ventilation in Argentina: a Prospective, Multicenter Cohort Study' and the CIBERESUCICOVID - Personalized Risk and Prognosis Factors and Follow-up at One Year of the Patients Hospitalized in the Spanish Intensive Care Units Infected with COVID -19' study. The investigators will use the individual patient data from ARDS patients with another pulmonary infection from the 'LUNG -SAFE - Large Observational Study to UNderstand the Global Impact of Severe Acute Respiratory FailurE' study and the 'ERICC - Epidemiology of Respiratory Insufficiency in Critical Care' study.