4C Mortality Score for COVID-19
Use completed whole years only.
years
Count qualifying comorbidities from the original 4C list.
count
breaths/min
Enter the oxygen saturation measured without supplemental oxygen.
%
GCS 15 scores 0 points; any value below 15 scores 2 points.
score
Enter urea in mmol/L.
mmol/L
Enter C-reactive protein in mg/L.
mg/L
Clinical noticeEducational COVID-19 risk support only. Use the 4C score in the correct hospitalized-adult setting and never as a stand-alone replacement for clinical judgment.
Context and use
Total score = age + sex + comorbidities + respiratory rate + room-air SpO2 + GCS + urea + CRP
Points: age 18-49=0, 50-59=2, 60-69=4, 70-79=6, >=80=7; male sex=1; comorbidities 0/1/>=2 = 0/1/2; RR <20/20-29/>=30 = 0/1/2; room-air SpO2 <92 = 2; GCS <15 = 2; urea <7/7-14/>14 = 0/1/3; CRP <50/50-99/>=100 = 0/1/2.
