Table 2.

Comparison of N stage, LNM, and LNR.

	N Stage	LNM	LNR
C-index (SD)	0.704 (0.034)	0.760 (0.039)	0.799 (0.036)
p	(reference)	0.023	0.002

SD, standard deviation; LNM, the number of metastatic lymph nodes; LNR, metastatic lymph node ratio.