Table 1. The different levels between metastatic and non-metastatic LNs.

Characteristic	Metastatic LNs, n (%)	Non-metastatic LNs, n (%)	P value
No. of LNs	139	220	–
Levels			0.000
II	13 (9.4)	44 (20.0)
III	9 (6.5)	42 (19.1)
IV	15 (10.8)	22 (10.0)
V	24 (17.3)	17 (7.7)
VIa	52 (37.4)	89 (40.5)
VIb	26 (18.7)	6 (2.7)

LNs, lymph nodes.