Table 2.
Characteristics of patients with idiopathic inflammatory myopathy.
| Diagnosis | Patients, n | Age, yrs, mean + SD | % Male |
|---|---|---|---|
| Dermatomyositis (DM) | 61 | 56.7 ± 15.0 | 24.6 |
| With cancer | 24 | 60.1 ±11.4 | 33.3 |
| Without cancer | 37 | 54.6 ±16.7 | 18.9 |
| Polymyositis | 63 | 55.7 ± 14.3 | 31.8 |
| With cancer | 3 | 72.0 ±8.7 | 100.0 |
| Without cancer | 60 | 54.9 ± 14.0 | 28.3 |
| Amyopathic DM | 23 | 54.4 ±12.7 | 30.0 |
| With cancer | 3 | 50.0 ±2.6 | 33.3 |
| Without cancer | 20 | 55.1 ± 13.5 | 30.0 |
| Overlap syndromes | 22 | 48.7 ±17.1 | 27.3 |
| With cancer | 1 | 83 | 0.0 |
| Without cancer | 21 | 47.0 ± 15.7 | 28.6 |
| Inclusion body myositis | 11 | 64.7 ±6.2 | 72.7 |
| With cancer | 1 | 64 | 0.0 |
| Without cancer | 10 | 64.8 ±6.5 | 80.0 |
| Juvenile dermatomyositis | 18 | 9.2 ±6.5 | 27.8 |
| With cancer | 0 | NA | NA |
| Without cancer | 18 | 9.2 ±5.6 | 27.8 |