Number of patients included in this study and disease classification.

<p>Of 56 patients identified, 8 patients were excluded because of comorbid connective tissue diseases (CTDs) (5 patients with Sjögren’s syndrome, 1 with systemic sclerosis, 1 with rheumatoid arthritis, and 1 with systemic lupus erythematosus). There were no patients who had active malignancies at initial diagnosis. Finally, 48 PM/DM-ILD patients were included in this study. PM, polymyositis; DM, dermatomyositis; ILD, interstitial lung disease; CTD, connective tissue disease; SS, Sjögren syndrome; SSc, systemic sclerosis; RA, rheumatoid arthritis; SLE, systemic lupus erythematosus; ELISA, enzyme-linked immunosorbent assay; RNA-IP, RNA immunoprecipitation.