Rheumatoid Factor (RF)

General Information

Rheumatoid factor is a significant serological marker of rheumatoid arthritis and can occur in 50 -90% of patients with RA, however, 2-10 % of apparently healthy adults have been shown to have a positive rheumatoid factor and Rheumatoid factors can oocur in up to 50% of patients with infection.

Patient Preparation

None

Notes

This method is suitable for serum samples only.

Reference Range

Up to 30 IU/mL = Negative

30-50= Weak Positive

Greater than 50 IU/mL = Positive

Specifications

EQA Scheme?: Yes
EQA Status:
UK NEQAS scheme for general autoimmune serology.

Department

Preferred Sample Type

Suitable Specimen Types

Sample Processing in Laboratory

Sample Preparation

Turnaround Time

Sample Stability

Rheumatoid Factor (RF)

General Information

Patient Preparation

Notes

Reference Range

Specifications

Date Record Created

Date last updated

Review Date