Rheumatoid factor

Condition Frequency
RA 80%
Sjogren's syndrome ~100%
Felty's syndrome ~100%
infective endocarditis = 50%
SLE 20-30%
systemic sclerosis 30%
general population 5%

Also rarely in rarely: TB, HBV, EBV, leprosy


Condition Frequency
EGPA 60%
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License