Rheumatoid Factor (R.A Factor)

The Rheumatoid Factor (RF / RA Factor) Test is a blood test used to detect rheumatoid factor, an autoantibody produced by the immune system that may be associated with certain autoimmune and inflammatory conditions.

This test helps healthcare professionals investigate Rheumatoid Arthritis (RA), a chronic autoimmune disease that primarily affects the joints, causing inflammation, pain, swelling, and stiffness.

The Rheumatoid Factor Test is commonly used alongside other clinical assessments and laboratory investigations to support the diagnosis of Rheumatoid Arthritis and related autoimmune disorders.

What Does This Test Check?

• Detects and may measure rheumatoid factor (RF) antibodies in the blood.

• Helps investigate suspected Rheumatoid Arthritis (RA).

• Supports the evaluation of persistent joint pain, swelling, and stiffness.

• May assist in assessing autoimmune conditions such as Sjögren's Syndrome.

• Provides additional diagnostic information alongside other inflammatory and autoimmune tests.

• Helps healthcare professionals determine whether further investigations are required.

Sample Requirements

• Sample Type: Clotted Blood or Serum

• Required Quantity: 2–3 ml

• Department: Immunology / Serology (subject to laboratory confirmation).

Patient Preparation

• Fasting is generally not required for the Rheumatoid Factor Test.

• Inform your healthcare provider if you experience persistent joint pain, swelling, or morning stiffness.

• Inform your doctor about any history of autoimmune or inflammatory conditions.

• Inform your healthcare provider about medications or supplements you are currently taking.

• Follow any specific sample collection instructions provided by the laboratory.

Important Information

The Rheumatoid Factor Test helps investigate autoimmune and inflammatory conditions, particularly Rheumatoid Arthritis.

A positive or elevated Rheumatoid Factor result indicates that rheumatoid factor antibodies were detected. This finding may support a diagnosis of Rheumatoid Arthritis when considered alongside symptoms and other investigations. However, a positive result alone does not confirm the condition.

Rheumatoid factor may also be elevated in individuals with Sjögren's Syndrome, certain chronic infections, other autoimmune disorders, and occasionally in healthy individuals, particularly older adults.

A negative Rheumatoid Factor result indicates that RF was not detected or was below the laboratory's reference threshold. However, a negative result does not completely rule out Rheumatoid Arthritis, as some patients have seronegative Rheumatoid Arthritis.

Additional investigations, such as Anti-CCP Antibodies, Erythrocyte Sedimentation Rate (ESR), C-Reactive Protein (CRP), and joint imaging, may be recommended depending on the patient's symptoms and clinical findings.

The laboratory may report RF as a qualitative result (positive or negative) or a quantitative value, depending on the testing method.

Results should be interpreted by a healthcare professional alongside symptoms, medical history, physical examination, and other relevant investigations.

Reporting Time: To be confirmed by the laboratory.

Please confirm test availability and sample collection requirements with the laboratory before booking.