Predicts the need for high-flow oxygen supplementation (≥ 6 L/min) or greater oxygen support within 24 hours of COVID-19 ED presentation. Useful for guiding disposition decisions — admission vs. discharge — in COVID-19 patients.

Parameters

Oxygen Saturation (SpO₂) on Room Air

SpO₂ ≥ 97%+0SpO₂ 93–96% (+1 pt)+1SpO₂ 90–92% (+2 pts)+2SpO₂ < 90% (+3 pts)+3

Respiratory Rate

< 22 breaths/min+022–28 breaths/min (+1 pt)+1> 28 breaths/min (+2 pts)+2

Supplemental Oxygen Required to Maintain SpO₂ ≥ 95%

No supplemental O₂ needed+01–3 L/min supplemental O₂ needed (+2 pts)+24–6 L/min supplemental O₂ needed (+3 pts)+3> 6 L/min or non-rebreather mask needed (+4 pts)+4

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CalculatorsQCSI (Quick COVID-19 Severity Index)

Infectious DiseaseScore

QCSI (Quick COVID-19 Severity Index)