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Table 1 Patient characteristics

From: The type I interferon signature in leukocyte subsets from peripheral blood of patients with early arthritis: a major contribution by granulocytes

  Healthy control subjects All patients IFNlow IFNhigh
Number of patients 25 26 18 8
Female, n (%) 16 (64) 20 (77) 13 (72) 7 (88)
Age, years, mean (SD) 35 (10) 47 (14) 48 (16) 44 (9)
DAS28, mean (SD) n/a 4.6 (1.2) 4.7 (1.3) 4.4 (1.0)
Duration of symptoms in weeks,a mean (SD) n/a 16 (25) 20 (29) 8 (8)
IgM-RF positivity, n (%) n/a 19 (73) 13 (72) 6 (75)
ACPA positivity, n (%) n/a 15 (58) 8 (44) 7 (88)
  1. Abbreviations: IgM-RF immunoglobulin M rheumatoid factor, ACPA anticitrullinated protein antibodies, DAS28 Disease Activity Score in 28 joints, n/a not applicable, IFN low patients within the 95 % limits of healthy control subjects, IFN high patients with an interferon signature
  2. aData missing for one patient