Five-Factor Score (FFS) for Vasculitis

Calculate the revised Five-Factor Score (FFS 2009) for systemic necrotizing vasculitis (EGPA, MPA, PAN) to predict 5-year mortality risk based on clinical and laboratory features.

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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 revised Five-Factor Score (FFS 2009) for systemic necrotizing vasculitis (EGPA, MPA, PAN) to predict 5-year mortality risk based on clinical and laboratory features

Each component has a specific meaning:

  • Clinical — The clinical recorded for the scenario being assessed.
  • Laboratory features — The laboratory features recorded for the scenario being assessed.

Note: Interpret the ffs vasculitis result against the thresholds and context described above.

How to Use

Enter the clinical, laboratory features for the scenario you are assessing. Calculate the revised Five-Factor Score (FFS 2009) for systemic necrotizing vasculitis (EGPA, MPA, PAN) to predict 5-year mortality risk based on clinical and laboratory features. Use the ffs vasculitis result to inform your calculation.

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Frequently Asked Questions