Calprotectin as Rheumatoid Arthritis Flare Marker

Interpret serum and fecal calprotectin levels as biomarkers of inflammation in rheumatoid arthritis and IBD overlap. Serum calprotectin (S100A8/A9) reflects joint macrophage activation; fecal calprotectin indicates gut inflammation.

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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 to Use

Enter the values for the scenario you are assessing. Interpret serum and fecal calprotectin levels as biomarkers of inflammation in rheumatoid arthritis and IBD overlap. Serum calprotectin (S100A8/A9) reflects joint macrophage activation; fecal calprotectin indicates gut inflammation. Use the calprotectin ra flare result to inform your calculation.

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Frequently Asked Questions