Table 1

Characteristics of the 179 patients with early arthritis

Age, mean±SD, years54.1±14.7
Female sex, n (%)99 (55.3)
Symptom duration at inclusion, median (IQR), weeks15 (6–27)
Onset of symptoms, n (%)
 (sub) acute75 (43.4)
 Gradual92 (51.4)
Morning stiffness, median (IQR), minutes30 (15–60)
Swollen joint count, median (IQR)3 (2–6)
Tender joint count, median (IQR)6 (2–11)
ACPA positivity, n (%)45 (25.1)
RF positivity, n (%)54 (30.2)
CRP level, median (IQR)4 (3–12)
ESR level, median (IQR)14 (6–33)
Patient classification at baseline, n (%)
 RA (2010 ACR/EULAR criteria)66 (37)
 Unclassified arthritis65 (36)
 Psoriatic arthritis15 (8)
 Inflammatory osteoarthritis12 (7)
 Reactive arthritis6 (3)
 Other diagnoses15 (8)
  • 68 tender joint counts and 66 swollen joint counts were performed. At the 2-week visit, when the results of laboratory and radiological investigations were known, patients were classified according to the diagnoses presented.

  • ACPA, anticitrullinated peptide antibodies; ACR/EULAR, American College of Rheumatology/European League Against Rheumatism; CRP, C reactive protein; ESR, erythrocytes sedimentation rate; IQR, interquartile range; sd, standard deviation; RA, rheumatoid arthritis; RF, rheumatoid factor.