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Table 1 Baseline characteristics of children with juvenile idiopathic arthritis (JIA) and healthy controls tested for dynamic joint function

From: Dynamic knee joint function in children with juvenile idiopathic arthritis (JIA)

  Rheumatology cohort N = 54
Gender, male: female 21:33
Median age in years (range) 11.3 (5.7 – 19.6)
Mean disease duration in month (range) 20.9 (0 – 161)
JIA subtypes  
 • Oligoarticular arthritis 18
 • Polyarticular arthritis 5
 • Systemic arthritis 4
 • Psoriatic arthritis 6
 • Enthesitis-related arthritis 6
 • Unclassified arthritis 5
Non-JIA rheumatic diseases  
 • Dermatomyositis with arthritis 2
 • Other 8
  JIA cohort N = 36
Gender, male: female 12: 24
Median age in years (range) 12.3 (5.7 – 19.6)
Mean disease duration in month (range) 25.8 (0 – 161)
JIA subtypes  
 • Oligoarticular arthritis  
   ◦Extended 6
   ◦Persistent 9
 • Polyarticular arthritis 4
 • Systemic arthritis 3
 • Psoriatic arthritis 5
 • Enthesitis-related arthritis 5
 • Unclassified arthritis 4
Joint status (66 knee joints tested)  
 • active arthritis 14
 • inactive arthritis, history of arthritis 28
 • unaffected joints 24
Current treatments  
 • methotrexate 10
 • oral corticosteroidssteroids 5
 • NSAIDs 15
 • untreated 12
  Inception cohort N = 8
Gender male: female 2: 6
Median age in years (range) 10.5 (6.6 - 14.8)
Median height in cm (range) 141.8 (116.7 - 163.0)
Median weight in kg (range) 35.9 (20.7 - 57.1)
Handedness right/left/both 7/0/1
JIA disease duration after diagnosis  
   ≤1 month 4
   >1 month 4
JIA subtypes  
 • Oligoarticular arthritis 4
 • Psoriatic arthritis 1
 • Enthesitis-related arthritis 2
 • Unclassified arthritis 1
Side of affected knee joint right: left 4: 4
Current treatments  
 • NSAID 3
 • untreated 5
  Controls N = 9, 18 joints tested
Gender male: female 5 4
Median age in years (range) 12.1 (7.3 – 19.3)
Median height in cm (range) 156.0 (130.0 - 168.1)
Median weight in kg (range) 42.9 (25.2 – 73.1)
Handedness right/left/both 7/1/1
  1. Abbreviation: NSAIDS non-steroidal anti-inflammatory drugs.