Risk stratification system
The total predicted score calculated from the nomogram was used in a risk stratification system for predicting patient survival. Patients were grouped into those with low (total score, < 130.78) and high (total score, ≥130.78) risk. The median survival of the entire cohort of patients with low risk, and high risk were 24 and 7 months, respectively. It showed that Kaplan-Meier survival curves predicted by the nomogram were significantly different (Figure 5F).