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Table 1 Clinical features of the patients with juvenile idiopathic arthritis (n = 31)

From: T-cell activation without proliferation in juvenile idiopathic arthritis

Subclass of arthritis

No. of patients

F:M

Mean age of onset (range) (years)

Mean duration of disease (range) (years)

B27+ (no.)

ANA+ (no.)

Oligoarthritis

8

5:3

4.5 (1–13.8)

4.1 (0.3–8)

1

4

Extended oligoarthritis

2

1:1

6.8 (4.5–9)

3.6 (1.2–6)

0

0

Systemic arthritis

2

0:2

6 (2.5–9.6)

6.7 (0.4–13)

0

0

Psoriatic arthritis

8

4:4

7.6 (1.1–10.8)

5.6 (0.5–14.2)

2

6

Enthesitis-related arthritis

4

1:3

11.3 (7.7–12.7)

1.7 (0.1–4)

3

1

Polyarthritis RF-

5

2:3

6.8 (2–13)

1.9 (0.4–4.5)

1

3

Polyarthritis RF+

1

1:0

13.9

1

0

0

Other

1

0:1

12.9

0.2

0

0

  1. ANA = antinuclear antibodies; F = female; M = male; RF = rheumatoid factor.