Frequencies of antinuclear antibodies (ANA).
| ANA Type | No. Patients (%) |
|---|---|
| Systemic sclerosis-specific ANA | |
| Anticentromere antibody | 91 (51) |
| Antitopoisomerase I | 16 (9) |
| Anti-Th/To RNP | 14 (8) |
| Anti-PM-Scl | 6 (3) |
| Anti-RNA pol I, II, III (one I, III only) | 5 (3) |
| Anti-U3 RNP | 3 (2) |
| Connective tissue disease-associated ANA | |
| Anti-U1 RNP | 15 (8) |
| Anti-Ro and/or anti-La | 3 (2) |
| Other | |
| Unidentified ANA | 22 (12) |
| Negative | 7 (4) |