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Table 1 Comparison of characteristics of patients with Juvenile Psoriatic Arthritis (JPsA) in the different groups

From: Juvenile Psoriatic Arthritis (JPsA): juvenile arthritis with psoriasis?

  ERA N=16 Persistent oligoarticular N=44 Extended oligoarticular N=21 RF- polyarticular N=34 Polyarticular course N=55 Total cohort N=115 P value
Female:male 1:2.2 2.7:1 1:1.6 1:3.9 2.5:1 2:1 0.006*
Mean age at diagnosis in years # (median) 11.6±2.2 (12.1) 7.7±4.3 (7.4) 6.6±5 (3.5) 7.4±4.2 (7.2) 7.1±4.5 (5.8) 8±4.4 (8.1) 0.003**
Mean Length of follow-up in years # (median) 4.8±2.3 (4.9) 5.9±3.8 (4.9) 7.2±0.9 (6) 6.6±0.7 (6.5) 6.8±4.6 (6.1) 6.2±4.1 (5.3) 0.3**
Family history of psoriasis (percentage) 8 (50) 26 (59) 12 (57) 22 (65) 34 (62) 68 (59) 0.8**
Number of patients with positive ANA a 1/14 14/40 11/19 13/29 24/49 39/103 0.07**
Number of patients with positive HLA-B27 6/15 3/18 0/8 1/8 1/17 10/50 0.0001*
Number of patients with asymptomatic uveitis
(acute uveitis)
0 (5) 6 (0) 3 (0) 4 (0) 7 (0) 13 (5) 0.6*
Number of patients with dactylitis 3 11 11 11 22 36 0.09*
  1. #- values are shown as mean plus/minus standard deviation.
  2. a=Positive anti-nuclear antibody (ANA) defined as at least one positive ANA result.
  3. * Anova.
  4. **chi-square analysis.