Table 1

Baseline characteristics of the autoantibody-positive subjects (n=13)

Age (years)43 (22–57)
Female, n10
Disease activity parameters
 ESR (mm/h)8.0 (3–18)
 CRP (mg/l)1.6 (1.0–10.0)
 Patient global VAS (mm)40 (0–94)
 Patient VAS pain (mm)45 (1–98)
 Morning stiffness (min)5 (0–30)
 TJC-68 (n)2 (0–10)
 SJC-66 (n)0
Autoantibody status
 IgM-RF positive, n8
 ACPA positive, n10
 IgM-RF and ACPA positive, n5
 ACPA titre (kAU/l)*537 (35–2591)
 IgM-RF titre (kU/l)*56 (16–207)
  • All values are expressed as median (min–max).

  • * Only of positive individuals.

  • ACPA, anticitrullinated protein antibodies; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; IgM-RF, IgM rheumatoid factor; SJC, swollen joint count; TJC, tender joint count; VAS, visual analogue scale.