IgG4-RD Responder Index (IgG4-RD RI)

Calculate the IgG4-Related Disease Responder Index (IgG4-RD RI) to measure disease activity and treatment response across 26 organs in IgG4-related disease. Used in trials and as treat-to-target outcome.

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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 IgG4-Related Disease Responder Index (IgG4-RD RI) to measure disease activity and treatment response across 26 organs in IgG4-related disease. Used in trials and as treat-to-target outcome

Each component has a specific meaning:

  • 26 organs in IgG4-related disease — The 26 organs in igg4-related disease recorded for the scenario being assessed.

Note: Interpret the igg4-rd ri result against the thresholds and context described above.

How to Use

Enter the 26 organs in IgG4-related disease for the scenario you are assessing. Calculate the IgG4-Related Disease Responder Index (IgG4-RD RI) to measure disease activity and treatment response across 26 organs in IgG4-related disease. Used in trials and as treat-to-target outcome. Use the igg4-rd ri result to inform your calculation.

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Frequently Asked Questions