Combined variable of variables i, iii and in-hospital mortality (this is understood to be: respiratory deterioration or need for mechanical ventilation or in-hospital death);Immune hyperactivation situation: LDH, D-dimer and ferritin value at 24 hours, 3 and 7 days. Each one is a quantitative variable.;Mechanical ventilation: qualitative variable (yes or no);Respiratory situation at 24 hours, 3 and 7 days based on the PaO2 / FiO2 ratio that graduates respiratory distress into mild (200-300), moderate (100-200) and severe (<100).

Combined variable of variables i, iii and in-hospital mortality (this is understood to be: respiratory deterioration or need for mechanical ventilation or in-hospital death);Immune hyperactivation situation: LDH, D-dimer and ferritin value at 24 hours, 3 and 7 days. Each one is a quantitative variable.;Mechanical ventilation: qualitative variable (yes or no);Respiratory situation at 24 hours, 3 and 7 days based on the PaO2 / FiO2 ratio that graduates respiratory distress into mild (200-300), moderate (100-200) and severe (<100).