Rheumatoid Factor

MeasuredUseful

An antibody found in some people with rheumatoid arthritis.

Also positive in healthy people, so as a screening test it produces more worry than answers.

How we rate it: Useful

Worth doing for a specific reason: a risk factor, a symptom, an age group.

This rating and the description above were written against published screening guidelines by someone who is not a clinician, and are awaiting review by one. We would rather say that than imply an authority we do not have.

Check-ups that include it

In 22 of the 93 check-ups we track, 24%. Cheapest first.

and 10 more.

Also sold as

Every one of these names refers to this same test. Resolving them to one canonical entry is what makes an honest comparison possible.

  • ra
  • ra factor
  • ra rheumatoid arthritis factor
  • rheumatoid factor

Information here is for comparing packages, not for diagnosing yourself. Talk to a doctor about which tests you actually need.