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Table 1 Patient characteristics

From: Type I interferon response gene expression in established rheumatoid arthritis is not associated with clinical parameters

  All patients (n = 182)
Demographic parameters
 Age, years, mean (SD) 54.2 (11.8)
 Female sex, n (%) 135 (75)
Disease parameters
 Disease duration in years, mean (SD) 9.7 (10.3)
 DAS28, mean (SD) 5.1 (1.2)
 Erosive disease, n (%) 131 (72)
 Nodules, n (%)a 43 (24)
Laboratory parameters
 ESR, mm/h, mean (SD) 24.5 (18.0)
 CRP, mg/L, mean (SD) 17.8 (22.1)
 IgM-RF titer, IU/ml, mean (SD)b 124.7 (279)
 IgM-RF-positive, n (%)b 95 (59)
 ACPA titer, AU/ml, mean (SD)c 1563 (2680)
 ACPA-positive, n (%)c 131 (75)
 IFN score, mean (SD) 0.26 (1.01)
Medication parameters
 MTX use, n (%) 152 (84)
 MTX dosage in mg/week, mean (SD) 21.0 (6.3)
 Prednisone use, n (%) 52 (29)
 Prednisone dosage in mg/day, mean (SD) 7.2 (3.5)
 HCQ use, n (%) 35 (19)
 SSZ use, n (%) 27 (15)
  1. Abbreviations: ACPA Anticitrullinated protein antibodies, CRP C-reactive protein, DAS28 28-joint Disease Activity Score, ESR Erythrocyte sedimentation rate, HCQ Hydroxychloroquine, IFN Interferon IgM-RF Immunoglobulin M rheumatoid factor, MTX Methotrexate, SSZ Sulfasalazine
  2. aNot available for 6 patients
  3. bNot available for 21 patients
  4. cNot available for 7 patients