Analysis of lymph node metastasis and survival prognosis in early gastric cancer patients: A retrospective study

Table 1 Univariate analysis of lymph node metastasis in 1011 patients with early gastric cancer

Clinicopathological factors	Assignment	Lymph node metastasis (n = 239)	No lymph node metastasis (n = 772)	χ²	P value
Sex
Male	1	131	430	0.06	0.809
Female	0	108	342
Age
≤ 60 yr old	0	131	432	0.10	0.755
> 60 yr old	1	108	340
BMI
≤ 24 kg/m²	1	162	539	0.56	0.511
> 24 kg/m²	0	77	233
Family history of gastric cancer
Yes	1	92	284	0.23	0.633
No	0	147	488
Smoking history
Yes	1	84	266	0.04	0.845
No	0	155	506
Drinking history
Yes	1	67	191	1.04	0.308
No	0	172	581
Tumor size
≤ 2 cm	0	99	478	31.29	< 0.001
> 2 cm	1	140	294
Tumor location
Upper part of the stomach	1	6	84	15.82	< 0.001
Mid-stomach	2	50	143
Lower part of the stomach	3	183	545
Tumor invasion depth
Mucosal lining	0	53	393	61.11	< 0.001
Submucosa	1	186	379
Vasculatogenic cancer thrombus
No	0	102	64	157.26	< 0.001
Yes	1	137	708
Nerve invasion
No	0	21	24	13.83	< 0.001
Yes	1	218	748
Degree of tumor differentiation
Low differentiation	1	125	376	Z = -2.45	0.014
Medium differentiation	2	88	208
High differentiation	3	26	188

BMI: Body mass index.