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Table 1 Baseline characteristics of patients with very early inflammatory arthritis

From: Synovial fluid leukocyte apoptosis is inhibited in patients with very early rheumatoid arthritis

Characteristic RA Non-RA P
   Persistent Resolving  
n 17 17 47  
Female (n [%]) 9 (53%) 6 (35%) 24 (51%) NSa
Age, years (median [IQR]) 64 (58–73) 37 (25–58) 41 (29–64) RA versus non-RA persistent: P = 0.001b; RA versus resolving: P = 0.0008b
Symptom duration (weeks; median [IQR]) 7 (5–9) 7 (2.5–11.5) 3 (1–5) RA versus resolving P < 0.0001b
CRP (median [IQR]) 32 (18–53) 62 (31–95) 32 (10–96) NSb
RF positive (n [%]) 13 (76%) 1 (6%) 5 (10.6%)  
  1. aχ2 test. bMann-Whitney test. CRP, C-reactive protein; IQR, interquartile range; NS, not significant; RA, rheumatoid arthritis; RF, rheumatoid factor.