ABSTRACT
Objective To investigate the clinical value of combined detection of anti-cyclic citrullinated peptide antibody(anti-CCP antibody),rheumatoid factor(RF),C-reactive protein(CRP)and erythrocyte sedimentation rate(ESR)in the diagnosis of rheu-matoid arthritis(RA).Methods The detection results of the four serum indicators of 290 cases of patients with RA(RA group), 286 cases of patients with non-RA autoimmune diseases(non-RA group)and 1 50 cases of healthy individuals(control group),from March 2013 to August 2014 in this hospital,were retrospectively analysed.Results The serum levels of the four indicators have significant differences among the three groups,between the RA group and non-RA group,and between the RA group and control group(P =0.000).Between non-RA group and control group,there was significant difference of serum levels of anti-CCP antibodies (P =0.013),while the other three serum indicators had no significant differences (P >0.05).The sensitivity of combined detection of anti-CCP antibody and RF,combined detection of anti-CCP antibody,RF and CRP,combined detection of anti-CCP antibody,RF and ESR,and combined detection of anti-CCP antibody,RF,CRP and ESR for RA diagnosis have statistically significant differences (P 0.05 ).The area under a receiver operating characteristic (ROC) curve of anti-CCP antibody,RF,CRP and ESR were 0.873,0.893,0.678 and 0.747,respectively. Conclusion Combined detection of anti-CCP antibody and RF has good specificity and sensitivity,which could improve the clinical diagnosis of RA.Combined detection of CRP and ESR could improve the detection rate of RA.