Table 4.

Spearman analysis of the correlation between tumor location and clinicopathological data

Characteristics	Tumor location
	Spearman correlation	P value
Gender	-0.056	0.001
Age	0.148	< 0.001
BMI	-0.022	0.197
Family history	0.019	0.279
Smoking history	0.040	0.020
Drinking history	0.022	0.202
Range of resection	0.256	< 0.001
Differentiation	-0.092	< 0.001
Pathological type	0.041	0.019
Vascular tumor thrombus	0.054	0.002
Nerve invasion	0.128	< 0.001
Maximum tumor diameter	0.169	< 0.001
Tumor depth	0.190	< 0.001
Lymph node metastasis	0.077	< 0.001
pTNM	0.159	< 0.001
CEA	0.083	< 0.001
CA19-9	0.080	< 0.001
CA125	0.013	0.452
AFP	0.014	0.410
CA242	0.064	< 0.001
CA72-4	0.048	0.006

CEA: Carcinoembryonic antigen; CA: Carbohydrate antigen; BMI: Body mass index; pTNM: Pathological tumor-node-metastasis.