Based on the results of univariate Cox proportional hazards regression analysis, β2-MG, Creatinine (Creat), ALB, and PTBP1 expression (HR = 1.435, 95% CI: 1.059–1.943, p = 0.020) were included in the multivariable Cox proportional hazards regression analysis which indicated that the PTBP1 expression was still an independent prognostic factor in terms of OS in 559 MM patients (HR = 1.359, 95% CI: 1.001–1.845, p = 0.049, Table 3). This evidence concerns the gene PTBP1 and Miyoshi myopathy.