MDCalc

Quick COVID-19 Severity Index (qCSI)

Predicts 24-hr risk of critical respiratory illness in patients admitted from ED with COVID-19.

Launched during the COVID-19 crisis.

Respiratory rate, breaths/min

Pulse oximetry

Lowest value recorded during the first four hours of the patient encounter

O2 flow rate, L/min

Result:

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Advice
  • The authors suggest: 
    • A score ≤3 indicates a low likelihood of critical respiratory illness and mortality within 24 hours.
    • A score >3 suggests a higher likelihood for progression to respiratory failure.
  • Several subsequent studies have used different cutoffs to predict COVID-19 mortality.
  • No treatment recommendations based on qCSI scoring are currently available, but patients with higher scores may benefit from higher levels of care.
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