Table 2. Numbers and metastatic rates of therapeutic (node positive) repeat surgery compartment neck dissection (CCND)

	Right CCND		p-value*
	Paratracheal LNs	Upper paraesophageal LNs
No. of removed LNs	2.83±2.70	2.12±1.04
No. of metastatic LNs	2.07±1.66	0.60±0.44
Metastatic LNs rate	94.4% (34/36)	30.6% (11/36)	<0.001†

Student t-test.
p<0.05 when comparing the preoperative and postoperative values.
CCND: central compartment neck dissection, LNs: lymph nodes; No.: numbers.