Estimates risk of critical respiratory illness within 24 hours in adults admitted with COVID-19.
Overview
Estimates risk of critical respiratory illness within 24 hours in adults admitted with COVID-19.
Clinical Significance
Use only in the population and setting for which qCSI was validated.
When to Use
- Use as decision support when all required inputs are reliable.
How It Is Calculated
- Point score from respiratory rate, oxygen saturation and nasal-cannula flow.
Interpretation
- Use only in the population and setting for which qCSI was validated.
Worked Example
Enter verified values in the displayed units; MedicalC applies the published equation or point system.
Limitations
- Prediction models may be miscalibrated outside their derivation population.
- Measurement and classification error can materially change the result.
Clinical Pearls
- Document source values and units with the result.
- Use trends and the full clinical picture.
Common Mistakes
- Wrong units.
- Using non-contemporaneous inputs.
- Treating the output as a diagnosis or mandatory treatment decision.
Frequently Asked Questions
What does this tool calculate?
Estimates risk of critical respiratory illness within 24 hours in adults admitted with COVID-19.
Can the result be used alone?
No. Interpret it with the complete clinical assessment and current guidance.
References
- Haimovich AD et al. Ann Emerg Med. 2020;76:442-453. — Primary or supporting reference for the implemented model.
Reviewed by: MedicalC Clinical Editorial Team
Last reviewed: July 2026