qSOFA Score — Quick SOFA Sepsis Screening

Calculate the quick SOFA (qSOFA) score using three bedside criteria — respiratory rate ≥22, altered mentation, and systolic BP ≤100 mmHg — to identify patients with suspected infection at high risk of sepsis.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate the quick SOFA (qSOFA) score using three bedside criteria — respiratory rate ≥22, altered mentation, and systolic BP ≤100 mmHg — to identify patients with suspected infection at high risk of sepsis

Each component has a specific meaning:

  • Three bedside criteria — respiratory rate ≥22 — The three bedside criteria — respiratory rate ≥22 recorded for the scenario being assessed.
  • Altered mentation — The altered mentation recorded for the scenario being assessed.
  • Systolic BP ≤100 mmHg — — The systolic bp ≤100 mmhg — recorded for the scenario being assessed.

Note: Interpret the qsofa score result against the thresholds and context described above.

How to Use

Enter the three bedside criteria — respiratory rate ≥22, altered mentation, systolic BP ≤100 mmHg — for the scenario you are assessing. Calculate the quick SOFA (qSOFA) score using three bedside criteria — respiratory rate ≥22, altered mentation, and systolic BP ≤100 mmHg — to identify patients with suspected infection at high risk of sepsis. Use the qsofa score result to inform your calculation.

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