Table 4. Multivariate analysis of the left RLN LN metastasis alone.

Risk factors	B	P value	OR value (95% CI)
Short axis diameter of left RLN LN	1.556	0.002	4.741 (1.739–12.922)
Short axis diameter of the tumor	0.243	0.137	1.275 (0.926–1.755)
SLN (positive vs. negative)	1.192	0.082	3.294 (0.859–12.630)
PLN (positive vs. negative)	0.828	0.121	2.288 (0.803–6.516)
Constant term	−4.213	0.000	0.015

RLN LN, recurrent laryngeal nerve lymph node; SLN, subcarinal lymph node status; PLN, paraoesophageal lymph node status; CI, confidence interval; OR, odds ratio; B, regression coefficient.