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Table 1 Demographic and laboratory features, given by median (interquartile range), of patients stratified by JIA subtype

From: Evaluation of anti-citrullinated type II collagen and anti-citrullinated vimentin antibodies in patients with juvenile idiopathic arthritis

 

JIA

IgM RF+ polyarthritis

IgM RF- polyarthritis

Oligoarthritis

Systemic arthritis

Psoriatic arthritis

Enthesitis-related arthritis

 

n=95

n=16

n=36

n=24

n=13

n=3

n=3

Sex, no. females/males

77/18

14/2

30/6

22/2

8/5

3/0

0/3

Age, median (IQ range)

12 (5–16)

14.5 (9.8-16)

12 (5.3-15.5)

10 (4.3-12)

10.5 (4.8-14.3)

17 (15–17)*

16 (5–17)*

Disease duration, median (IQ range)

2 (0.5-6.5)

0.5 (0.4-5.1)

2.3 (0.6-6)

2 (0.6-8.1)

3.8 (1–9.5)

4 (0–8)*

2.5 (1–7)*

Tender/swollen joint count, median (IQ range)

8 (2–10)

10 (8–13)

8 (6–12)

1 (1–2)

9 (1–22)

2 (1–8)*

2 (1–2)*

No. patients with joint damage (%)

20 (20.8)

5 (31.3)

10 (27.8)

1 (4.2)

4 (30.8)

0 (0.0)

0 (0.0)

CRP, median (IQ range) mg/dl

0.7 (0.3-1.9)

2.6 (0.8-13.3)

0.80 (0.3-4.8)

0.8 (0.3-5.5)

4.9 (2.2-16.3)

0.7 (0.33-2.1)*

0.4 (0.3-2.7)*

(% positive)

(36.8)

(50.0)

(33.3)

(25.0)

(29.2)

(33.3)

(33.3)

ESR, median (IQ range) mm/hr

16 (7–37)

20 (8–31)

14 (7–32)

15 (7–31)

30 (7–50)

6 (6–32)*

7 (2–7)*

(% positive)

(50.5)

(68.8)

(44.4)

(45.8)

(69.2)

(33.3)

(0.0)

  1. CRP: C-reactive protein; ESR: Erythrocyte sedimentation rate.
  2. Cut-points for a positive value: CRP (≥0.8 mg/dl), ESR (≥15 mm/hr). *range is given due to small sample size.