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Table 3 Presence of uveitis, antinuclear antibodies, antihistone antibody levels and HLA-B27 according to country of origin in 435 children in the Nordic juvenile idiopathic arthritis (JIA) cohort

From: Incidence and predictors of Uveitis in juvenile idiopathic arthritis in a Nordic long-term cohort study

  Denmark n = 91 Norway n = 105 Sweden n = 101 Finland n = 138
No uveitis 73 (80.2) 86 (81.9) 87 (86.1) 100 (72.5)
Acute uveitis 3 (3.3) 4 (3.8) 1 (1.1) 1 (0.7)
Chronic uveitis 15 (16.5) 15 (14.3) 13 (12.9) 37 (26.8)
Female gender 62 (68.1) 67 (70.5) 67 (66.3) 83 (60.1)
Oligoarticular onset 45 (49.5) 51 (48.6) 55 (54.5) 73 (52.9)
Age at onset 4.8 (2.2, 9.3) 5.9 (2.8, 9.9) 6.9 (3.2, 11.3) 5.1 (2.3, 8.7)
ANA positive 28 (30.8) 32 (32.0) 23 (22.8) 33 (24.4)
HLA-B27 positive 14 (15.6) 29 (27.6) 20 (21.5) 24 (19.2)
  1. Data are numbers (percent) except median (1st and 3rd quartile) for Age at onset; age at onset of arthritis, ANA antinuclear antibodies measured by immunofluorescence on Hep-2 cells, two positive tests taken more than 3 months apart in participants with one or more tests takenm HLA-B27 human leucocyte antigen B27