Purser Wellness approved rule
Unit: IU/mL
Male: <14
Female: <14
How to read this marker
Assay-specific and nonspecific. Interpret with symptoms and anti-CCP.
The wider testing context
Autoimmune tests are not interpreted as simple high/low values. Pretest probability, titer, pattern, repeatability, symptoms, and organ findings matter.
Using this reference
This is the approved adult, nonpregnant baseline unless the rule explicitly states otherwise. Keep the performing laboratory’s reference interval separate from this Purser Wellness rule. Match units and review the specimen, method, timing, medicines and relevant clinical context before interpreting a result. These pages do not calculate a personal high/low status or prescribe treatment.
A question to bring to your visit
Which parts of the Rheumatoid factor rule apply to my report’s method, units and collection conditions, and what other findings should we review alongside it?
Approved by Dr. Daniel Purser, MD · PW-LABS-1.0. The source laboratory’s interval remains separate.
Names you may see
Rheumatoid factor