CRP and rheumatoid arthritis: These recommended indices are derived from the ACR RA Core Data Set measures [3] and include data from three sources: (1) health professional: assessor global (DOCGL), tender joint count (TJC), and swollen joint count (SJC); (2) patient questionnaires: patient global estimate (PATGL), pain, and physical function (FN); and (3) laboratory tests: C-reactive protein (CRP) level or erythrocyte sedimentation rate (ESR).