Table 1.
Frequencies of autoantibodies recognizing citrullinated minus noncitrullinated recombinant rat filaggrin, expressed as differential ACRF (dACRF), in patients with various rheumatic diseases and healthy controls (group 1)
| dACRF | |||
|---|---|---|---|
| Disease | Patients n | n | % |
| Rheumatoid arthritis (subgroup 1a) | 101 | 59 | 58·4 |
| Non-RA rheumatic diseases (subgroup 1b) | 225 | 1 | 0·4 |
| Systemic lupus erythematosus | 32 | 0 | 0 |
| Primary Sjögren's syndrome | 26 | 1 | 3·8 |
| CREST syndrome; progressive systemic sclerosis | 18 | 0 | 0 |
| Mixed connective tissue disease | 10 | 0 | 0 |
| Dermatopolymyositis | 14 | 0 | 0 |
| Adult-onset Still's disease | 16 | 0 | 0 |
| Spondylarthropathies | 69 | 0 | 0 |
| Ankylosing spondylitis | 31 | 0 | 0 |
| Psoriatic arthritis/reactive arthritis | 38 | 0 | 0 |
| Osteoarthritis | 20 | 0 | 0 |
| Crystal-induced arthritis | 20 | 0 | 0 |
| Healthy controls (subgroup 1c) | 96 | 0 | 0 |