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Table 2 Comparison of the predictive performance of 2 staging systems for overall survival of testing set

From: A modified TNM staging system for non-metastatic colorectal cancer based on nomogram analysis of SEER database

Overall survival Characteristics 7th TNM Staging Nomo-staging
1-year c-index 5.8751 e−1 6.0841 e−1
AIC 23,403.22 23,249.95
L.R. 4.4306 e2 5.9033 e2
2-year c-index 6.0633 e−1 6.2550 e−1
AIC 35,187.99 34,904.74
L.R. 1.2062 e3 1.4835 e3
3-year c-index 6.1699 e−1 6.3344 e−1
AIC 39,280.45 39,082.20
L.R. 2.0783 e3 2.2706 e3
  1. Abbreviation: AIC Akaike information criteria; L.R Likelihood ratio