Table 4.

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

	OS			DFS
	MLNR <0.2 (%)	MLNR ≥0.2 (%)	P-value	MLNR <0.2 (%)	MLNR ≥0.2 (%)	P-value
Depth ≤1/2	59.6	35.7	<0.001	57.0	20.4	<0.001
Depth >1/2	49.5	34.6	0.001	42.5	30.6	0.013

Note: Depth, depth of primary tumor invasion.

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