| Variables | All | ASS | DM | value |
| CK (U/L) | 66.5 (26.0, 383.8) | 63.5 (25.3, 344.5) | 142 (33, 623.3) | 0.209 | ESR (mm/h) | 24.0 (13.5, 36.3) | 21.5 (15, 31.5) | 28 (9.5, 37.3) | 0.578 | CRP (mg/L) | 6.7 (4.7, 10.6) | 8.1 (4.7, 10) | 6.4 (4.5, 11.3) | 0.324 | LDH (U/L) | 293.5 (232.8, 471.3) | 285.0 (224.5, 337.5) | 322.0 (258.0, 549.0) | 0.333 | WBC (×109/L) | 7.1 (5.2, 9.1) | 7.9 (5.9, 9.4) | 6.1 (4.4, 8.4) | 0.073 | Lymphocyte (×109/L) | 0.9 (0.5, 1.3) | 1.2 (0.9, 1.5) | 0.6 (0.4, 1.1) | 0.03 | Neutrophil (×109/L) | 5.3 (3.6, 7.2) | 6.2 (4.2, 8.1) | 4.6 (3.2, 6) | 0.077 | FVC (%) | 81.2 (66.6, 92.2) | 74.3 (64.8, 83.9) | 84 (66.6, 105) | 0.164 | DLCO (%) | 71.4 (48.9, 83.8) | 48.3 (35.5, 58.4) | 81.8 (77, 86.3) | <0.0001 | Disease duration (month) | 3.0 (2.4, 6.0) | 3 (2.1, 6) | 3 (2.8, 8.4) | 0.401 | Myositis antibodies, | | | | | Anti-Jo-1 | 13 | 13 | 0 | | Anti-OJ | 2 | 2 | 0 | | Anti-EJ | 4 | 4 | 0 | | Anti-PL-7 | 1 | 1 | 0 | | Anti-PL-12 | 3 | 3 | 0 | | Anti-MDA5 | 12 | 0 | 12 | | Anti-NXP-2 | 3 | 0 | 3 | | Anti-TIF-1γ | 4 | 0 | 4 | | Anti-Mi-2 | 1 | 0 | 1 | | Anti-Ro-52 (alone) | 4 | 0 | 4 | | Anti-Ro-52 (with other antibodies) | 26 | 16 | 10 | | Negative | 2 | 0 | 2 | |
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