Table 5.

OS and DFS based on MLNR category according to the depth of primary tumor invasion category

	OS			DFS
	Depth ≤1/2	Depth >1/2	P-value	Depth ≤1/2	Depth >1/2	P-value
MLNR <0.2 (%)	59.6	49.5	<0.001	57.0	42.5	<0.001
MLNR ≥0.2 (%)	35.7	34.6	0.920	20.4	30.6	0.362

Note: Depth, depth of primary tumor invasion.

Abbreviations: OS, overall survival; DFS, disease-free survival; MLNR, metastatic lymph node ratio.