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Table 1 Characteristics of 86 children with JIA, either treatment-naïve, or treated with MTX or ETN

From: Fecal microbiota in children with juvenile idiopathic arthritis treated with methotrexate or etanercept

  Treatment-naïve (n = 45) MTX (n = 29) ETN (n = 12)
Female sex (%) 25 (56) 19 (66) 6 (50)
Age at sampling, years 10.9 (5.1–13.6) 9.3 (5.7–11.8) 8.22 (5.7–13.8)
Time from JIA onset to sampling, years 0.4 (0.2–3.1) 1.7 (1.0–3.8) 1.6 (1.0–2.6)
Time from start of medication to sampling, years   0.5 (0.3–0.8) 0.3 (0.2–0.7)
JIA category at onset, no (% girls)
 Oligoarticular 29 (62) 14 (71) 3 (67)
 Polyarticular RF neg 5 (60) 11 (73) 5 (60)
 Polyarticular RF pos 0 0 1 (100)
 Enthesitis-related 7 (29) 1 (0) 2 (0)
 Psoriatic 1 (0) 0 0
 Undifferentiated 3 (67) 3 (33) 1 (0)
  1. Data are median (1st–3rd quartile), unless otherwise indicated
  2. JIA Juvenile idiopathic arthritis, MTX Methotrexate, ETN Etanercept, RF Rheumatoid factor