Table 1

Baseline characteristics of 455 patients with early arthritis, and radiographic progression data of 175 patients

CharacteristicsAll patients (n=455)2010 ACR/EULAR+ (n=353)1987 ACR+ (n=310)Visser+ (n=254)
Demographic variables
 Age (years, mean (SD))52 (13)52 (13)53 (12)51 (12)
 Women (% of patients)69717075
 Disease duration (months, mean (SD))5.6 (5.5)5.5 (5.0)5.6 (5.0)5.8 (4.9)
 SJC5 (3–10)6 (3–11)7 (4–11)6 (3–10)
 TJC5 (2–9)6 (3–10)6 (3–10)5 (3–8)
 DAS28 score (mean (SD))4.8 (1.3)5.0 (1.2)5.2 (1.2)4.9 (1.1)
 HAQ score (range 0–3)1.13 (0.63–1.63)1.13 (0.75–1.75)1.25 (0.75–1.75)1.13 (0.75–1.63)
 RA according to ACR/EULAR (%)353 (77.6)100.089.497.6
 RA according to 1987 ACR (%)310 (68.1)78.5100.084.3
 Persistent arthritis according to Visser (%)254 (55.8)70.369.7100.0
Laboratory variables
 ESR (mm/first hour)25 (11–38)26 (13–41)27 (15–41)26 (13–41)
 CRP (mg/l)11 (4–31)13 (4–35)15 (5–35)13 (4–30)
 IgM-RF positive (%)42.653.354.272.0
 ACPA positive (%)52.066.259.487.4
Radiographic scores
 Erosion score 0 (% of patients)93.492.991.091.3
 Erosion score 1 (% of patients)6.87.19.08.7
 Total Sharp score at baseline0.0 (0.0–0.0)0.0 (0.0–0.0)0.0 (0.0–0.0)0.0 (0.0–0.0)
 Total Sharp score at 3 years (n=175)0.0 (0.0–4.0)1.0 (0.0–5.0)1.0 (0.0–4.5)1.0 (0.0–6.0)
  • Results are shown as median (IQR) unless stated otherwise.

  • ACPA, anti-citrullinated protein antibody; ACR, American College of Rheumatology; CRP, C-reactive protein; DAS28, Disease Activity Score (28-joint count); ESR, erythrocyte sedimentation rate; EULAR, European League Against Rheumatism; HAQ, Health Assessment Questionnaire; RA, rheumatoid arthritis; RF, rheumatoid factor; SJC, swollen joint count; TJC, tender joint count.