Rheumatoid factor (RF) in SSc overlap syndrome.
| SSc/Myositis | SSc/RA | SSc/SS | SSc/SLE | |||||
|---|---|---|---|---|---|---|---|---|
| lcSSc, n (%) | dcSSc, n (%) | lcSSc, n (%) | dcSSc, n (%) | lcSSc, n (%) | dcSSc, n (%) | lcSSc, n (%) | dcSSc, n (%) | |
| Patients | 73 (57) | 51 (40.2) | 80 (84.2) | 15 (15.8) | 41 (82) | 9 (18) | 19 (76) | 6 (24) |
| RF+ | 17 (23.3) | 13 (26) | 48 (60) | 7 (46.7) | 24 (58.5) | 3 (33.3) | 9 (47.4) | 2 (33.3) |
| RF− | 37 (50.7) | 24 (48) | 24 (30) | 5 (33.3) | 13 (31.7) | 6 (66.6) | 8 (42.1) | 3 (50) |
| RF unknown | 19 (26) | 14 (28) | 8 (10) | 3 (20) | 4 (9.8) | — | 2 (10.5) | 1 (16.7) |
Definitions as given in Table 1.