The diagnostic value of anti-cyclic citrullinated peptide antibodies (anti-CCP) in patients with rheumatoid arthritis

• Main Authors: Damjanovska Ljubinka, Atanasovska Violeta, Gruev Todor
• Format: Article
• Language: English
• Published: Society of Medical Biochemists of Serbia, Belgrade 2007-01-01
• Series: Journal of Medical Biochemistry
• Subjects: anti-cyclic citrullinated peptide antibodies; rheumatoid factor; rheumatoid arthritis
• Online Access: https://scindeks-clanci.ceon.rs/data/pdf/1452-8258/2007/0354-34470704285D.pdf

A cross-sectional study was carried out to analyze the prevalence of anti-CCP antibodies and IgM RF in the sera of 160 randomly selected patients from the Rheumatology Department: 60 with RA, 50 with other rheumatic diseases (non-RA), 50 healthy controls (HC). The mean age of the group was 50.06+/-11.9 years. There were 141 females (88.1%) and 19 males (11.9%). RA patients fulfilled the revised ACR criteria. The mean duration of the disease was 82.4 months. Anti-CCP ELISA kit and IgM RF Latex test were used. The mean anti-CCP values were as follows: RA 60.4+/ -57.6, non-RA 2.1+/-3.6, HC 1.3 +/-0.4 U/mL. Respectively, the mean values of IgM RF were: RA 515.8+/-525, non-RA 102+/-294, HC 15+/-57.5. Forty out of 60 (66.6%) RA patients were anti-CCP positive. Forty one out of 60 (68.3%) RA patients were positive for IgM RF. As expected, anti-CCP showed comparable sensitivity (66.8% vs. 68.3%) and higher specificity (98% vs. 87%) than IgM RF, at optimal cut-off values. The presence of either anti-CCP or IgM RF increased the testing sensitivity for the diagnosis of RA to 76.6%. AUC was greater for anti-CCP than for IgM RF (0.92 vs. 0.82).