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Table 1 Patient demographics

From: Patient’s experiences with the care for juvenile idiopathic arthritis across Europe

  Western countries Non-western countries P-valuea
N 420 202  
Female, n (%) 286 (68.1%) 129 (63.9%) 0.34
Age at completion, median [1st quartile, 3rd quartile] 10 [7, 15] 11 [8, 15] 0.50
Age at diagnosis, median [1st quartile, 3rd quartile] 5 [2, 9] 5 [3, 10] 0.04
Self-reported JIA category, n (%)
 Systemic 57 (13.6%) 23 (11.4%) 0.53
 Oligoarthritis 106 (25.2%) 62 (30.7%) 0.18
 Polyarthritis RF - 103 (24.5%) 41 (20.3%) 0.29
 Polyarthritis RF + 46 (11.0%) 14 (6.9%) 0.15
 Psoriatic 21 (5.0%) 5 (2.5%) 0.21
 ERA 25 (6.0%) 12 (5.9%) > 0.99
 Undifferentiated 19 (4.5%) 1 (0.5%) 0.02
 Don’t know 43 (10.2%) 44 (21.8%) 0.0002
  1. aP-value of the test of differences between western and non-western countries. For categorical data Pearson’s χ2-test was used; for continuous data the Mann-Whitney U test
  2. Abbreviations: ERA enthesitis-related arthritis, JIA juvenile idiopathic arthritis, RF rheumatoid factor