Then, 10 candidate predictors, i.e., with significant differences in univariable analyses, were incorporated into a multivariable Cox proportional hazards model with Rad-score, indicated as follows: age on admission, course of DM, arthralgia, three-category FVC% (FVC% ≥ 50%, FVC% <50%, and unable to perform pulmonary function tests), arterial oxygen/fraction of inspiration oxygen (PaO2/FiO2), lactate dehydrogenase (LDH), serum ferritin (ng/mL), C-reactive protein, lymphocyte, and maximum dosage of methylprednisolone (Table 3). The gene discussed is CRP; the disease is dermatomyositis.