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Table 1 Characteristics of the patients with dermatomyositis/polymyositis

From: Roles of mast cells in the pathogenesis of inflammatory myopathy

  DM PM P value
n = 15 n = 12
Age, years 67.0 (45.5-70.0) 54.0 (36.0-63.0) 0.556
Sex, % female 12 (80) 12 (100) 0.108
Disease duration, months 3.00 (2.00-4.00) 3.25 (2.75-6.00) 0.798
Anti-nuclear Ab-positive, % 8 (53.3) 6 (50.0) 0.564
Anti-Jo-1-Ab-positive, % 2 (13.3) 1 (8.3) 0.817
CK, IU/l 2,913 (499-9,029) 1,929 (1,219-3,552) 1.000
MMT score, 0-90 76.0 (72.0-78.5) 75.0 (70.0-80.0) 0.814
Number of patients with ILD, % 6 (40.0) 4 (33.3) 0.734
Allergic disease, % 1 (6.67) 1 (8.33) 0.695
  1. Values shown are median (interquartile range). P values were calculated by the Wilcoxon test or Fisher’s exact test. Ab, antibody; CK, creatine kinase; DM, dermatomyositis; ILD, interstitial lung disease; MMT, manual muscle testing; PM, polymyositis.