Journal
JOURNAL OF CLINICAL LABORATORY ANALYSIS
Volume 28, Issue 1, Pages 21-26Publisher
WILEY
DOI: 10.1002/jcla.21638
Keywords
rheumatoid arthritis; anti-CCP antibodies; rheumatoid factor; DAS28
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Funding
- Ministry of Higher Education and Scientific Research, Tunisia
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ObjectiveTo explore relationships between immunological status, clinical features, radiographic damage, disease activity, and functional disability in Tunisian patients with rheumatoid arthritis (RA). Materials and MethodsThe study was carried out in 112 patients with RA. Demographic characteristics, disease duration, disease activity score 28 (DAS28), the Health Assessment Questionnaire (HAQ), and the Sharp/van der Heijde score were collected. Anticyclic citrullinated peptide antibody (anti-CCP) and rheumatoid factor (RF) were performed. ResultsWe found that anti-CCP positivity was associated with longer disease duration (P = 0.001), presence of RF (P = 4.89 x 10(-8)), and night pain positivity (P = 0.025). Patients with positive RF had more night pain and higher anti-CCP positivity (for all P 0.05). Anti-CCP titer was correlated with disease duration (P = 0.034) and Sharp total score (P = 1.2 x 10(-4)). Moreover, there was a significant correlation between RF and anti-CCP antibodies titers (P = 0.011). Indeed, DAS28 correlated with HAQ (P = 1.8 x 10(-7)) and morning stiffness duration (P = 0.045). In multivariate regression analysis, the main factors associated with anti-CCP titers were radiographic damage (P = 1.625 x 10(-4)) and RF (P = 0.013). For DAS28, only HAQ (P = 2.9 x 10(-4)) was associated. ConclusionThese findings suggest that anti-CCP antibodies are associated with RF and more severe joint damage. Moreover, disease activity is associated with functional disability. (C) 2013 Wiley Periodicals, Inc.
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