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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.