Demographic, laboratory, and clinical characteristics of enrolled RA* patients.

*RA, rheumatoid arthritis; Mean [SD], mean ± standard deviation; RF, IgM rheumatoid factor; Anti-CCP, anti-cyclic citrullinated peptide 3 antibody; MCP-1, macrophage chemotactic protein-1; PTX3, pentraxin 3; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; GH, visual analog scale for general health [maximum score = 100]; DAS28, disease activity score 28 [ESR included]; DAS28-MCP-1, disease activity score 28 [MCP-1 included instead of ESR]; DAS28-CRP, disease activity score 28 [CRP included]. +Data shown are median [25th percentile, 75th percentile]. Serum rheumatoid factors were examined at diagnosis (newly diagnosed RA patients) and were not subsequently re-checked, however, 33% of regularly treated RA patients had RF re-checked on enrollment due to loss of the data; anti-CCP antibodies were measured on enrollment for all RA patients.