Table 2. Baseline characteristics of the patients with UA, categorized according to the development of RA after a median follow-up of 9 months (range – months).
| Characteristics | No progression to RA (n = 28) | Progression to RA (n = 26) |
|---|---|---|
| Age in years, mean +/- SD | 48.7 ± 14.1 | 43.7 ± 9.2 |
| Female gender n / % | 16 / 57.1% | 19 / 73.1% |
| Morning stiffness > 1hour n / % | 6 / 21.4% | 12 / 46.1% |
| Swollen joint count (28 assessed) +/- SD | 2.4 ± 2.5 | 3.0 ± 2.7 |
| Arthritis of hands n / % | 4 / 14.3% | 19 / 73.1% |
| Symmetric involvement of joints n / % | 12 / 42.9% | 8 / 30.8% |
| Psoriasis n / % | 3 / 10.7% | 0 / 0% |
| ACPA positivity n / % | 0 / 0% | 20 / 76.9% |
| Rheumatoid factor positivity n / % | 2 / 7.1% | 19 / 73.1% |
| ACR/EULAR 2010 criteria positivity n / % | 1 / 3.6% | 11 / 42.3% |
| X-ray erosions n / % | 0 / 0% | 3 / 11.5% |
| CRP > normal value n / % | 5 / 17.9% | 13/ 50.0% |