Population | Early disease | Established disease |
---|---|---|
Number | 103 | 151 |
Male/Female (n) | 44/59 | 63/88 |
Age (years; mean ± SD) | 55.0 ± 13.4 | 60.2 ± 11.1 |
Age at onset (years; mean ± SD) | 54.3 ± 13.4 | 46.6 ± 12.1 |
Disease duration (years; mean ± SD) | 0.7 ± 0.5 | 13.7 ± 6.3 |
Rheumatoid factor ever positive (%) | 52/92 (56.5) | 86/126 (68.3) |
Nodule positive (%) | 4/102 (3.9) | 28/150 (18.7) |