RA Test (Titre) Description The RA Test measures the level of rheumatoid factor (RF) antibodies in the blood. RF is an antibody that can attack healthy tissue in the body. High levels of RF are often found in people with rheumatoid arthritis and can help in diagnosing the disease. However, high RF levels can also be present in other conditions or in some healthy individuals. Procedure: Sample Collection: A blood sample is drawn from a vein, usually in the arm. Laboratory Analysis: The sample is analyzed in a lab to measure the RF levels. Results: Results are usually given as a titre (ratio), indicating the dilution level at which RF can be detected. Higher titres suggest higher levels of RF. Interpretation: Normal Range: Typically, a titre below 1:80 is considered normal. Elevated RF: A titre of 1:80 or higher may indicate rheumatoid arthritis or another autoimmune condition.