Table 5

COVID-19 mortality risk stratification based on SOARS score

Risk class
(score level)
Derivation cohort
(N=821 with full data; deaths=258)
Aintree validation cohort
(N=290 with full data; deaths=94)
ISARIC validation cohort
(N=14 231; deaths=4319)
Mortality by risk class (%)Proportion of deaths by risk class (%)Mortality by risk class (%)Proportion of deaths by risk class (%)Mortality by risk class (%)Proportion of deaths by risk class (%)
Low (0–1)6/163 (3.7%)6/258 (2.3%)3/35 (8.6%)3/94 (3.2%)128/2362 (5.4%)128/4319 (3.0%)
Moderate (2)6/102 (5.9%)6/258 (2.3%)3/37 (8.1%)3/94 (3.2%)273/1879 (14.5%)273/4319 (6.3%)
High (≥3)246/556 (44.2%)246/258 (95.3%)88/218 (40.4%)88/94 (93.6%)3917/9990 (39.2%)3917/4319 (90.7%)
  • SOARS, SpO2, Obesity, Age, Respiratory rate, Stroke history.