Development and validation of a prognostic nomogram for colorectal cancer after surgery

Table 3 Prognostic accuracy of N stage, log odds of positive lymph nodes, and lymph node ratio

	C-index	AIC	AUC
			1-yr	3-yr	5-yr
N stage	0.6712	9906.03	0.695	0.702	0.696
LODDS	0.6497	9887.95	0.690	0.673	0.660
LNR	0.6494	9890.20	0.689	0.673	0.659

C-index: Harrell concordance index; AIC: Akaike information criterion; AUC: Area under the curve; LODDS: Log odds of positive lymph nodes; LNR: Lymph node ratio.