Comparison of survival differences between groups with different scores based on the nomogram
After determining that the nomogram had good predictive value, we wanted to distinguish the patients’ OS according to their scores. Accordingly, we stratified the patients into two groups based on the cutoff value, that is, the median of the total scores in the training cohort. In the training cohort, patients with low-risk scores (score < 73.15) had a better OS than those with high-risk scores (score ≥ 73.15) (Survival curves of OS for risk classification based on the nomogram risk score. 