Menu

An expert resource for medical professionals
Provided FREE as a service to women’s health

The Alliance for
Global Women’s Medicine
A worldwide fellowship of health professionals working together to
promote, advocate for and enhance the Welfare of Women everywhere

An Educational Platform for FIGO

The Global Library of Women’s Medicine
Clinical guidance and resourses

A vast range of expert online resources. A FREE and entirely CHARITABLE site to support women’s healthcare professionals

The Global Academy of Women’s Medicine
Teaching, research and Diplomates Association

Laboratory Tests

This section provides detailed information on a wide range of laboratory tests relevant to women's medicine

A rapid reference

Rheumatoid Factor

Many individuals with rheumatoid arthritis have a substance in their blood called "rheumatoid factor." 

As the diagnosis of rheumatoid arthritis is based on a number of clinical factors, only one of which is the presence of the RA factor, its' presence alone is not diagnostic of rheumatoid arthritis, but is supportive of the diagnosis:

  • Some people with RA do not have the RA factor
  • Some normal people have the RA factor
  • RA factor appears in some individuals with a variety of other illnesses, including:
    • Cancer
    • Viral infections
    • Syphilis
    • Tuberculosis
    • Lupus
    • Sjoegren's syndrome

Normal Values*

RA Factor 0-69 IU/ml
(Nonreactive)

*These are general values taken from a variety of sources. The actual normal values may vary from lab to lab and from one type of testing protocol to another.