Fig. 4

DCA for the nomogram and the AJCC staging system in the training set a, b, c and validation set d, e, f for 1, 3, and 5-year survival, respectively. Horizontal coordinates represented the threshold of probability, whereas the vertical coordinates represented the net benefit rate. The red and black dash lines represented DCA of the nomogram, and the AJCC staging system, respectively. The black solid line assumed all patients were alive, whereas the gray solid one with a negative slope assumed all patients were dead. DCA plot depicted the model with superior clinical application