qSOFA Score — Free Online Calculator
Criteria
qSOFA Score
0
Low risk — not qSOFA positive
About This Calculator
The quick SOFA (qSOFA) score is a bedside screening tool for identifying patients with suspected infection who are at greater risk of poor outcomes outside the ICU. It uses three simple clinical criteria that can be assessed without laboratory tests. A qSOFA score ≥ 2 suggests the patient may have sepsis and should prompt further assessment with the full SOFA score and consideration of ICU-level care.
Formula
Interpretation
| qSOFA Score | Interpretation |
|---|---|
| 0 – 1 | Low risk — not qSOFA positive |
| 2 – 3 | High risk — consider ICU level care |
References
- Seymour CW, et al. Assessment of clinical criteria for sepsis: for the Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3). JAMA. 2016;315(8):762-774.
- Singer M, et al. The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3). JAMA. 2016;315(8):801-810.
Frequently Asked Questions
Should qSOFA replace SIRS for sepsis screening?
qSOFA was introduced with Sepsis-3 as a bedside screening tool, but it has lower sensitivity than SIRS for sepsis detection. Many guidelines recommend using qSOFA for risk stratification rather than as the sole screening tool. Some institutions continue to use SIRS criteria for initial screening.
Can qSOFA be used in the ICU?
qSOFA was specifically designed and validated for use outside the ICU (emergency department, general wards). In the ICU, the full SOFA score is recommended for organ dysfunction assessment.
What should I do if qSOFA is ≥ 2?
A qSOFA ≥ 2 should prompt: assessment for organ dysfunction using the full SOFA score, evaluation for source of infection, consideration of ICU-level care, blood cultures and early antibiotics if infection is suspected, and lactate measurement.
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⚠ Medical Disclaimer
This tool is for educational and informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for clinical decisions.