Patient characteristics at baseline (n=433)
| Age at symptom onset (years), median (IQR) | 56 (42–68) |
| Female (No (%)) | 280 (64.7) |
| Symptom duration (months), median (IQR) | 5.4 (2.8–11.3) |
| Number of swollen joints, median (IQR) | 6 (1–14) |
| HAQ1-150 score, median (IQR) | 0.75 (0.25–1.50) |
| RF1-150 positive (No (%)) | 139/375 (37.1) |
| Satisfied 1987 ACR1-150criteria for RA (No (%)) | 208 (48.0) |
↵1-150 HAQ = Health Assessment Questionnaire; RF = rheumatoid factor; ACR = American College of Rheumatology.