7.

Comparison of performances of different staging systems in patients with ≥16 harvested lymph nodes

System	AUC (c-index)	AIC	Linear trend χ2
AUC, area under the curve; AIC, Akaike information criterion; UICC, Union for International Cancer Control; MLR, metastatic lymph node ratio, LODDS, log odds of positive lymph nodes.
MLR	0.676	90.692	0.931
LODDS	0.664	89.446	2.507
8th UICC N-stage	0.648	94.249	0.914
7th UICC N-stage	0.644	92.252	0.824