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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