Identification of Three Different Phenotypes in Anti–Melanoma Differentiation–Associated Gene 5 Antibody–Positive Dermatomyositis Patients: Implications for Prediction of Rapidly Progressive Interstitial Lung Disease

Cluster analysis identified 3 distinct clinical patterns and outcomes in our large cohort of anti-MDA5+ DM patients. Classification of DM patients into phenotype subgroups with prognostic values may help physicians improve the efficacy of clinical decision-making.