The impact of lymphadenectomy on lymph node recurrence after performing various treatments for esophageal squamous cell carcinoma

Table 5 Results of the univariate analysis of factors associated with overall survival using a Cox proportional hazards model

Varieties	Hazard Ratio	95% Confidence Interval	p-value
Sex
Male	1.00	Reference	Reference
Female	1.35	0.28, 6.50	0.71
Age (per year)	1.01	0.93, 1.09	0.86
No. of metastatic nodes	1.04	0.95, 1.13	0.41
Stage
Stage I	1.00	Reference	Reference
Stage II ≤	4.27	0.84–21.76	0.08
Initial treatment
Esophagectomy	1.00	Reference	Reference
ER	0.20	0.02, 1.66	0.14
CRT/CT	0.59	0.12, 2.86	0.52
Recurrent part
Cervical	1.00	Reference	Reference
Mediastinal	2.47	0.59, 10.38	0.22
Abdominal	5.16	0.90, 29.5	0.07
pR
0	1.00	Reference	Reference
1 ≤	1.49	0.31, 7.22	0.62

ER endoscopic resection, CT chemotherapy, CRT chemoradiotherapy, pR pathological residual tumor
We removed two patients who had no metastatic lymph nodes on pathology

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