Medicine Rheumatoid factor in rheumatoid ahritis is impoant because: A RA factor is associated with bad prognosis B Absent RA factor rules out the diagnosis of Rheumatoid ahritis C It is very common in childhood Rheumatoid ahritis D It correlates with disease activity 💡 Explanation Rheumatoid factor in rheumatoid ahritis is impoant because: ✓ Correct Answer: A. RA factor is associated with bad prognosis