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Table 1 Characteristics of patients with JIA and controls

From: Physical activity in patients with oligo- and polyarticular juvenile idiopathic arthritis diagnosed in the era of biologics: a controlled cross-sectional study

  Oligo JIA (n = 30) Poly JIA (n = 30) P-value
oligo vs poly JIA
JIA total (n = 60) Controls (n = 60) P-value
JIA total vs controls
Age (yrs) 13.5 (2.2) 13.7 (2.2) 0.62 13.6 (2.2) 13.5 (2.6) 0.86
Female sex, n (%) 27 (90) 23 (77) 0.17 50 (83) 50 (83) 1.00
Height (cm) 157.1 (11.8) 158.7 (13.6) 0.64 157.9 (12.6) 161.2 (12.6) 0.16
Weight (kg) 47.0 (10.1) 51.5 (16.2) 0.21 49.3 (13.8) 53.5 (15.4) 0.12
BMI (kg/m2) 18.8 (2.1) 20.1 (4.4) 0.17 19.4 (3.5) 20.2 (3.5) 0.26
NRS current pain (0–10), n (%) with score > 0 12 (40) 11 (37) 0.76 23 (38) 18 (30) 0.34
NRS pain previous week (0–10) 0.0 (2.0–3.3) 1.0 (0.0–3.5) 0.58 1.0 (0.0–3.0) 1.0 (0.0–3.0) 0.67
NRS fatigue previous week (0–10) 3.5 (2.0–6.3) 3.0 (2.0–5.3) 0.61 3.0 (2.0–6.0) 3.0 (1.0–3.5) 0.09
CRP > 4 mg/l, n (%) 1 (3) 2 (7) 1.00 3 (5) 0 (0) 0.24
Physiotherapy regularly, n (%) 3 (10) 10 (33) 0.03 13 (22) 4 (7) 0.04
Disease duration (yrs) 7.6 (3.9) 7.3 (4.0) 0.74 7.5 (3.8) NA  
JADAS 71 (0–101) 3.3 (0.8–4.8) 3.2 (1.4–4.6) 0.80 3.3 (1.1–4.8) NA  
CHAQ (0–3) 0.1 (0.0–0.3) 0.0 (0.0–0.4) 0.62 0.0 (0–1.4) NA  
Off medication, n (%) 10 (33) 2 (7) 0.02 12 (20) NA  
NSAIDs regularly, n (%) 9 (30) 7 (23) 0.56 16 (27) NA  
Synthetic DMARDs, n (%) 18 (60) 22 (73) 0.27 40 (67) NA  
 MTX, n (%) 17 (57) 21 (70) 0.28 38 (63) NA  
 Sulfasalazine, n (%) 1 (3) 1 (3) 1.00 2 (3) NA  
Biologic DMARDs, n (%) 5 (17) 20 (67) < 0.001 25 (42) NA  
 TNFi, n (%) 5 (17) 18 (60) 0.001 23 (38) NA  
 IL-6i, n (%) 0 (0) 2 (7) 0.49 2 (3) NA  
Synthetic+biologic DMARDs, n (%) 5 (17) 14 (47) 0.01 19 (32) NA  
Active disease, n (%) 18 (60) 22 (73) 0.27 40 (67) NA  
Clinical inactive disease, n (%) 12 (40) 8 (27)   20 (33) NA  
  1. Numbers are mean (SD) or median (25th -75th percentile) unless otherwise indicated
  2. JIA juvenile idiopathic arthritis, Oligo JIA persistent oligoarticular JIA, Poly JIA extended oligoarticular JIA and polyarticular JIA RF +/−, JIA total persistent oligoarticular JIA, extended oligoarticular JIA and polyarticular JIA RF +/−, RF rheumatoid factor, BMI body mass index, NRS numeric rating scale, CRP C-reactive protein, JADAS juvenile arthritis disease activity score, CHAQ childhood health assessment questionnaire, NSAIDs non-steroid anti-inflammatory drugs, DMARDs disease modifying anti-rheumatoid drugs, MTX methotrexate, TNFi tumor necrosis factor inhibitors, IL-6i interleukin-6 inhibitor, NA not applicable