Table 1.
Patient profile
| No. | Age (years) | Sex | Disease duration (months) | Samples | CPK(U/l) | LDH(U/l) | Diagnosis | Interstitial lung disease | Internal malignancy | ANA |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 76 | F | 3 | Skin/muscle | 644 | 559 | Definite DM | + | 1280 | |
| 2 | 75 | F | 2 | Skin/muscle | 200 | 413 | Definite DM | + | Colon | 40 |
| 3 | 75 | M | 2 | Skin/muscle | 830 | 467 | Definite DM | + | 80 | |
| 4 | 58 | M | 2 | Skin/muscle | 2448 | 647 | Definite DM | + | 80 | |
| 5 | 57 | M | 3 | Skin/muscle | 941 | 795 | Definite DM | − | 80 | |
| 6 | 51 | F | 1 | Skin/muscle | 774 | 368 | Definite DM | − | Uterus | 40 |
| 7 | 41 | F | 1 | Skin/muscle | 2063 | 764 | Definite DM | + | 5120 | |
| 8 | 46 | F | 11 | Skin/muscle | 32 | 302 | Probable DM | + | 40 | |
| 9 | 33 | F | 2 | Skin/muscle | 4988 | 553 | Definite DM | − | 40 | |
| 10 | 77 | F | 3 | Skin/muscle | 434 | 416 | Definite DM | − | Lung | 160 |
| 11 | 65 | M | 5 | Skin/muscle | 1415 | 398 | Definite DM | + | − | |
| 12 | 32 | M | 1 | Skin/muscle | 908 | 435 | Definite DM | + | − | |
| 13 | 37 | F | 9 | Muscle | 785 | 318 | Definite PM | + | 80 | |
| 14 | 53 | F | 5 | Muscle | 274 | 233 | Definite DM | + | 40 | |
| 15 | 23 | M | 1 | Muscle | 4387 | 739 | Definite DM | − | − | |
| 16 | 43 | M | 5 | Muscle | 4957 | 916 | Definite DM | + | 40 | |
| 17 | 51 | F | 10 | Muscle | 3923 | 628 | Definite DM | − | 640 | |
| 18 | 81 | M | 1 | Muscle | 1532 | 532 | Definite DM | − | Oesophagus | 160 |
| 19 | 44 | F | 2 | Muscle | 226 | 274 | Definite DM | + | 40 | |
| 20 | 39 | F | 2 | Muscle | 50 | 172 | Definite PM | − | 40 | |
| 21 | 46 | F | > 20 | Muscle | 386 | 331 | Definite PM | + | − | |
| 22 | 63 | F | 3 | Skin | 64 | 246 | Probable DM | + | 40 | |
| 23 | 50 | F | 6 | Skin | 855 | 456 | Definite DM | + | 320 | |
| 24 | 30 | M | 5 | Skin | 82 | 418 | Definite DM | + | − | |
| 25 | 45 | F | 1 | Skin | 206 | 298 | Definite DM | + | − | |
| 26 | 56 | F | 12 | Skin | 384 | 285 | Definite DM | + | − | |
| 27 | 55 | F | 3 | Skin | 4732 | 800 | Definite DM | + | 640 | |
| 28 | 74 | F | 4 | Skin | 1432 | 437 | Definite DM | − | − |
ANA = anti-nuclear antibody; CPK = creatine phosphokinase (normal values <204 U/l); DM = dermatomyositis; PM = polymyositis; F = female; M = male; LDH, lactate dehydrogenase (normal value < 208 U/l).