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Table 3 Factors affecting concordance between physicians' and parents' assessment of functional ability. Values are medians (interquartile range) unless otherwise indicated

From: Agreement between physicians and parents in rating functional ability of children with juvenile idiopathic arthritis

  Concordance (N = 107) Parent over-rating (N = 29) Physician over-rating (N = 19) P
No. (%) female 89 (83.2) 17 (58.6) 14 (73.7) 0.02§
ILAR category, no. (%)$     
   Oligoarthritis persistent 41 (38.3) 6 (20.7) 4 (21) 0.005§
   Oligoarthritis extended 35 (32.7) 9 (31) 3 (15.8)  
   Polyarthritis 20 (18.7) 5 (17.2) 8 (42.1)  
   Systemic arthritis 7 (6.5) 8 (27.6) 4 (21.1)  
   Psoriatic arthritis 4 (3.8) 1 (3.5) 0 (0)  
ANA positive, no. (%) 85 (79.4) 19 (65.5) 14 (73.7) 0.25§
Patients with = 5 joints involved 31 (29.0) 13 (44.8) 15 (78.9) <0.001₤
Age at onset, years 3 (1.7–5.5) 3.1 (1.66–6) 3.1 (1.68–6.58) 0.86
Age at visit, years 11.87 (9.7–14.5) 10.8 (8.9–14.6) 15 (9–19.6) 0.39
Disease duration, years 7.65 (5.63–10.1) 6.9 (5.19–8.8) 9.3 (6.2–13.4) 0.14
Physician's global assessment 2.4 (0–5.8) 2.5 (1.4–6.3) 5 (1–8.3) 0.23
Parent's global assessment 0.50 (0–3) 1.45 (0.45–3.55) 0.65 (0.45–3.7) 0.11
Parent's pain assessment 0.6 (0–2.5) 2 (0.55–5.2) 1.2 (0–3) 0.011
Swollen joint count 1 (0–3) 2 (1–3) 3 (0–11) 0.036
Tender joint count 1 (0–3) 2 (1–4) 4 (2–12) <0.001
Restricted joint count 1 (0–3) 2 (0–5) 5 (2–18) <0.001
Active joint count 1 (0–3) 2 (1–5) 6 (2–16) <0.001
Morning stiffness, minutes 0 (0–5) 0 (0–10) 0 (0–10) 0.41
ESR, mm/hour 14 (10–27) 21 (10–35) 16 (10–21) 0.29
C-reactive protein, mg/dl 0.1 (0.1–0.58) 0.1 (0.1–1.44) 1.16 (0.1–1) 0.027
JADI-Articular score 0 (0–1) 1 (0–2) 3 (0–12) <0.001
JADI-extraarticular score 0 (0–1) 0 (0–1) 0 (0–1.5) 0.29
Poznanski score, units (N = 84) - 1.18 (- 2.8–0.095) - 1.7(-3.1 – -0.05) - 1.1 (-04 – -0.47) 0.69
CHQ-PhS 52.91 (47.26–55.28) 51.4 (44.4–52.9) 50.9 (42.4–53.9) 0.19
CHQ-PsS 49.95 (43.62–54.44) 47.6 (42.5–51.2) 50.3 (43–58.3) 0.23
C-HAQ score 0 (0–0.25) 0.3 (0–0.93) 0.1 (0–0.75) 0.004
Steinbrocker class, no (%)
I 74 (69.2) 20 (69) 3 (15.8) <0.001₤
II-IV 33 (30.8) 9 (31) 16 (84.2)  
Physician's categorical scale
I 73 (68.2) 22 (75.9) 0 (0.0) < 0.001§
II 17 (15.9) 4 (13.8) 10 (52.6)  
III-VI 17 (15.9) 3 (10.3) 9 (47.4)  
Parent's categorical scale
I 73 (68.2) 0 (0.0) 13 (68.4) < 0.001§
II 17 (15.9) 15 (51.7) 2 (10.5)  
III-VI 17 (15.9) 14 (48.3) 4 (21.1)  
  1. See Table 1 for abbreviations and score ranges. $For purposes of the analysis, patients with the ILAR category of undifferentiated arthritis (n = 15) were classified within polyarthritis and extended oligoarthritis categories based on the number of joints affected in first 6 months of disease.
  2. Comparisons for all quantitative variables were made with the Kruskall-Wallis test. ₤Chi-square test; §Fisher Exact test.
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