Proportion of antibody and organ involvement. Values are n (%) unless otherwise specified.
| Variables | Positive | Negative | Total, n |
|---|---|---|---|
| Antibodies | |||
| ANA | 278 (76.2) | 18 (4.9) | 296 |
| ATA | 164 (44.9) | 151 (41.4) | 315 |
| ACA | 32 (8.8) | 227 (62.2) | 259 |
| ARA | 45 (12.3) | 251 (68.8) | 296 |
| Anti-Sm | 11 (3) | 250 (68.5) | 261 |
| Anti-SSA | 84 (23) | 181 (49.6) | 265 |
| Anti-SSB | 22 (6) | 239 (65.5) | 261 |
| Anti-PM-1 | 7 (1.9) | 163 (44.7) | 170 |
| Anti-Jo1 | 9 (2.5) | 241 (66) | 250 |
| RF | 44 (12.1) | 139 (38.1) | 183 |
| Organ involvement | |||
| Lung | 77 (21.1) | 211 (57.8) | 288 |
| Heart | 194 (53.2) | 86 (23.6) | 280 |
ANA: antinuclear; ATA: anti-DNA topoisomerase I; ACA: anticentromere; ARA: anti-U1RNP; RF: rheumatoid factor.