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RA levels are tested for if there is a suspicion that a person may be suffering from Rheumatoid arthritis. Not everyone has a Rheumatoid factor and in 20% of cases people that have RA don't have any RF at all. A diagnosis of Rheumatoid Arthritis is generally the result of several observations including RF SED rate (inflammation) X-ray results and possibly others.

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12y ago

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