Table 3

- Association between clinical characteristics and idiopathic inflammatory myositis (IIM) types.

Clinical characteristicIIM types
DMPMIBMAnti-synthetaseP-value
n (%)
Heliotrope rash (Yes)7 (100.0)0 (0.0)0 (0.0)0 (0.0)0.112
Gottron’s papules9 (100.0)0 (0.0)0 (0.0)0 (0.0)0.035*
V sign3 (100.0)0 (0.0)0 (0.0)0 (0.0)0.548
Shawl sign3 (100.0)0 (0.0)0 (0.0)0 (0.0)0.548
Raynaud’s phenomenon1 (50.0)1 (50.0)0 (0.0)0 (0.0)0.867
mechanics hands2 (50.0)0 (0.0)0 (0.0)2 (50.0)0.006**
Painless muscle weakness (proximal/distal)16 (64.0)7 (28.0)1 (4.0)1 (4.0)0.006**
Dysphagia5 (50.0)4 (40.0)1 (10.0)0 (0.0)0.237
Arthritis3 (42.9)2 (28.6)0 (0.0)2 (28.6)0.096
  • ** p<0.01,

  • * p<0.05, DM: dermatomyositis, PM: polymyositis, IBM: inclusion body myositis