Table 2.

Log-rank analysis stratified by the number of CLNMs demonstrating the risk of lateral neck recurrence

Numbers of central lymph node metastases	5-year LRFS rate	P value
		1	2	3	4	5	≥ 6
1(n = 977)	0.986	—	0.212	0.518	0.000	0.000	0.000
2(n = 573)	0.973	0.212	—	0.703	0.000	0.000	0.000
3(n = 354)	0.978	0.518	0.703	—	0.001	0.000	0.000
4(n = 221)	0.908	0.000	0.000	0.001	—	0.452	0.694
5(n = 138)	0.893	0.000	0.000	0.000	0.452	—	0.567
≥ 6(n = 237)	0.912	0.000	0.000	0.000	0.694	0.567	—