**Figure 6.** (**A**) Univariate Cox regression for risk-score, gender, age, and tumor stage in the training set found that risk score and stage were independent prognostic factors (*p*<0.05). (**B**) Multivariate Cox regression for risk-score, gender, age, and tumor stage in the training set found that risk score and stage were independent prognostic factors (*p*<0.05). (**C**) Univariate Cox regression for risk-score, gender, age, and tumor stage in the validation set found that risk-score and stage were independent prognostic factors (*p*<0.05). (**D**) Multivariate Cox regression for risk-score, gender, age, and tumor stage in the validation set found that risk score, age, and stage were independent prognostic factors (*p*<0.05). (**E**) Univariate Cox regression for risk-score, gender, age, and tumor stage in the entire set found that risk-score, age, and stage were independent prognostic factors (*p* <0.05). (**F**) Multivariate Cox regression for risk-score, gender, age, and tumor stage in the entire set found that risk score, age, and stage were independent prognostic factors (*p* <0.05).