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Table 1 Autoantibody prevalence in a cohort of adult Italian patients with PM/DM.

From: Anti-MJ/NXP-2 autoantibody specificity in a cohort of adult Italian patients with polymyositis/dermatomyositis

  Total
(n = 58)
DM
(n = 27)
PM
(n = 25)
Overlap syndrome
(n = 6)
Myositis-related antibodies     
Anti-MJ 17% (10) 30% (8)1 8% (2)1 0
Anti-Jo-1 10% (6) 02 24% (6)2 0
Anti-p155/140 5% (3) 7% (2) 0 17% (1)
(DM-SLE-Sjögren's)
Anti-SRP 5% (3) 0 8% (2) 17% (1)
(PM-RA)
Anti-EJ 3% (2) 4% (1) 4% (1) 0
Anti-Mi-2 2% (1) 5% (1) 0 0
Anti-OJ 2% (1) 0 4% (1) 0
Anti-PM/Scl 10%(6) 11% (3) 8% (2) 17% (1)
(DM-SSc)
Anti-U1RNP 7% (4) 4% (1) 4% (1) 33% (2)
(DM-SSc; PM-SLE)
Anti-Ro 3% (2) 0 8% (2) 0
Anti-Su 3% (2) 4% (1) 0 17% (1)
(PM-SSc)
Negative/unknown 38% (22) 41% (11) 40% (10) 17% (1)
(PM-SSc)
  1. 1P = 0.078; 2P = 0.0087 by Fisher's exact test. DM, dermatomyositis; PM, polymyositis; RA, rheumatoid arthritis; SLE, systemic lupus erythematosus. SSc, systemic sclerosis.