Rheumatoid factor — lab reference
Some search terms matchedAssay-specific and nonspecific. Ask your clinician to read this result with symptoms and anti-CCP.
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What’s searchable?Assay-specific and nonspecific. Ask your clinician to read this result with symptoms and anti-CCP.
Assay-specific; higher values may carry greater specificity.
Ask your clinician to use performing-lab range and trend with C4/CH50 and disease activity.
Ask your clinician to use performing-lab range and trend.
Age and assay-specific. Ask your clinician to consider subclasses or electrophoresis when indicated.
Age and assay-specific. Important when interpreting IgA-based celiac testing.
Age and assay-specific.
Sample handling and test methods can change a cytokine result. Compare it with the exact range from your lab and ask why the test was ordered.
Your lab may use its own range. Symptoms, medicines, and the types of white blood cells also matter.
Altitude, smoking, hydration, androgen therapy, and pregnancy may shift values.
Ask your clinician to consider altitude and iron/B12/folate status. Pregnancy requires trimester-specific ranges.
Hydration and altitude are major modifiers. Ask your clinician to review alongside hemoglobin and RBC indices.
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