CHOSEN Score — COVID-19 Hospitalization Early Escalation Predictor

The COVID-19 Hospitalization Early Escalation Score (CHOSEN) is a validated risk stratification tool developed to predict in-hospital deterioration requiring high-flow oxygen, mechanical ventilation, or death in COVID-19 inpatients within 48–72 hours of admission. It was derived from a Spanish multicenter COVID-19 cohort and incorporates initial clinical and laboratory parameters. Unlike general COVID severity scores, CHOSEN specifically targets EARLY INPATIENT deterioration — allowing proactive ICU transfer rather than reactive crash escalation.