Improved prognostic stratification of the revised ninth edition American Joint Committee on Cancer staging system for colorectal cancer

Figure 4 Receiver operating characteristic curve analysis. A: Receiver operating characteristic curve (ROC) analysis for disease-free survival (DFS) in the colon cancer (CC) cohort according to 8^th edition American Joint Committee on Cancer (AJCC) staging system; B: ROC analysis for overall survival (OS) in the CC cohort according to 8^th edition AJCC staging system; C: ROC analysis for DFS in the CC cohort according to 9^th edition AJCC staging system; D: ROC analysis for OS in the CC cohort according to 9^th edition AJCC staging system; E: ROC analysis for DFS in the rectal cancer (RC) cohort according to 8^th edition AJCC staging system; F: ROC analysis for OS in the RC cohort according to 8^th edition AJCC staging system; G: ROC analysis for DFS in the RC cohort according to 9^th edition AJCC staging system; H: ROC analysis for OS in the RC cohort according to 9^th edition AJCC staging system. CC: Colon cancer; RC: Rectal cancer; DFS: Disease-free survival; OS: Overall survival; AUC: Area under the curve.