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Distribution of acute phase reactant levels at baseline. Distribution of ESR and CRP levels at baseline (A) among the 9,135 patients who had a visit with active RA (CDAI >2.8), and (B) among the 4,031 biologic-naïve patients who had a visit with active RA (CDAI >2.8). CDAI, Clinical Disease Activity Index; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; RA, rheumatoid arthritis.
