Age

< 50 years+050–59 years (+2 pts)+260–69 years (+4 pts)+470–79 years (+6 pts)+6≥ 80 years (+7 pts)+7

Sex at Birth

Female+0Male (+1 pt)+1

Number of Comorbidities

0 comorbidities+01 comorbidity (+1 pt)+1≥ 2 comorbidities (+2 pts)+2

Respiratory Rate

< 20 breaths/min+020–29 breaths/min (+1 pt)+1≥ 30 breaths/min (+2 pts)+2

Peripheral Oxygen Saturation (SpO₂)

≥ 92%+0< 92% (+2 pts)+2

Glasgow Coma Scale

GCS 15 (alert and oriented)+0GCS < 15 (+2 pts)+2

Blood Urea Nitrogen (BUN) or Urea

Urea < 7 mmol/L (BUN < ~20 mg/dL)+0Urea 7–14 mmol/L (BUN 20–39 mg/dL) (+1 pt)+1Urea > 14 mmol/L (BUN > 39 mg/dL) (+3 pts)+3

C-Reactive Protein (CRP)

CRP < 50 mg/L+0CRP 50–99 mg/L (+1 pt)+1CRP ≥ 100 mg/L (+2 pts)+2

4C Mortality Score (COVID-19)