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Table 5 Age at onset of arthritis, antihistone antibody levels and presence of antinuclear antibodies according to gender and presence of uveitis in 435 participants 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

  No uveitis Uveitis p
  n Age at onset of arthritis n Age at onset of arthritis  
Female 227 6.8 (2.5, 10.4) 59 3.4 (1.7, 7.5) < 0.001
Male 121 5.9 (3.2, 9.2) 27 3.9 (2.3, 7.9) 0.390
  n Presence of ANA n Presence of ANAa  
Female 222 65 (29.3) 59 27 (45.8) 0.016
Male 118 14 (11.9) 28 10 (35.7) 0.002
  n AHA IgM/IgG U/ml n AHA IgM/IgG U/ml  
Female 72 6.9 (5.2, 11.4) 16 14.2 (7.2, 27.9) 0.003
Male 40 7.1 (4.7, 11.0) 6 8.2 (4.5, 11.4) 0.794
  1. ANA antinuclear antibodies measured by immunofluorescence on Hep-2 cells, two positive tests taken >3 months apart in participants with one or more tests taken. AHA antihistone IgM/IgG antibodies U/ml, analyzed only in the Swedish and Danish cohort
  2. anumbers (percent), analysed by Chi-square test, otherwise median (1st, 3rd quartile), analyzed with Mann-Whitney rank sum test