To compare the relationship between RA patients who were positive to AFA,anti-CCP antibody with those who were in jointindex,morning stiffness time,erythrocyte sedimentation rate(ESR),C-reactive protein(CRP) and X-ray bone erosion negative.

• 2比较AFA、抗CCP抗体阳性组与阴性组间关节指数、晨僵时间、血沉(ESR)、C反应蛋白(CRP)、X线骨侵蚀之间的关系。