To identify risk factors, we used a logistic regression model and included factors with P values < 0.15 in dichotomous comparisons between PJP+ and PJP− IIM patients, such as corticosteroid dose, tacrolimus use, CD4+ T cell counts, albumin level, presence of diabetes, MDA5+ DM, disease duration, and interstitial lung disease. This evidence concerns the gene CD4 and dermatomyositis.