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Table 1 Baseline patient characteristics of all patients included in the study according to JIA subtype

From: Immature cell populations and an erythropoiesis gene-expression signature in systemic juvenile idiopathic arthritis: implications for pathogenesis

  Control Enthesitis related Extended oligo Persistent oligo RF-poly RF+poly Psoriatic All non-sJIA sJIA
Total (n) 38 33 8 53 58 15 9 176 23
Flow (n) 38 30 5 41 41 15 8 149 14
Expression (n) 29 29 7 38 47 14 8 143 21
Flow and expression (n) 29 26 4 26 30 14 7 107 12
Age at onset (yr) 10.8a ± 5.3 12.4 ± 2.5 4.7 ± 4.7 5.5 ± 4.0 8.1 ± 5.0 10.8 ± 3.0 7.5 ± 4.2 8.2 ± 4.8 5.6 ± 5.0
Onset to baseline (mo) N/A 7.1 ± 7.8 5.7 ± 3.3 4.4 ± 3.3 8.1 ± 8.3 5.8 ± 9.3 6.7 ± 7.5 6.4 ± 7.0 3.6 ± 5.9
Female (%) 57.8 15.2 100 67.9 75.9 93.3 66.7 64.2 34.8
WBC in 109/L N/A 6.7 ± 2.0 8.2 ± 2.3 9.0 ± 3.0 8.5 ± 3.6 8.0 ± 2.3 7.6 ± 1.0 8.2 ± 3.0 18.1 ± 9.6b
Hgb in g/dl N/A 13.1 ± 0.9 11.8 ± 0.9 12.2 ± 1.1 12.3 ± 1.1 12.4 ± 1.3 12.5 ± 0.7 12.4 ± 1.1 9.9 ± 1.4b
Plt in 109/L N/A 324 ± 76 368 ± 109 369 ± 96 384 ± 152 375 ± 113 370 ± 96 366 ± 117 548 ± 227b
ESR in mm/h N/A 15 ± 16 23 ± 17 19 ± 15 23 ± 18 31 ± 24 19 ± 17 21 ± 17 89 ± 40b
CRP in mg/dl N/A 1.6 ± 2.2 0.9 ± 1.3 1.2 ± 1.4 1.8 ± 2.8 2.0 ± 2.0 1.0 ± 0.9 1.5 ± 2.1 16.9 ± 14.0b
  1. aAge at sampling. bP < 0.05 (one-way ANOVA and all multiple pairwise comparisons (Tukey)). Numbers represent mean ± standard deviation, unless otherwise indicated. WBC, white blood cell count; Hgb, hemoglobin; ESR, erythrocyte sedimentation rate; CRP, C-reactive protein.