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

Table 3 Univariate analysis of prognosis in 1011 patients with early gastric cancer

Clinicopathological factors	Assignment	Cases	3-year overall survival rate (%)	χ²	P value
Sex
Male	1	561	96.6	1.89	0.169
Female	0	450	98.0
Age
≤ 60 yr old	0	563	98.9	5.95	0.015
> 60 yr old	1	448	97.3
BMI
≤ 24 kg/m²	0	701	97.4	0.76	0.384
> 24 kg/m²	1	310	96.9
Family history of gastric cancer
Yes	1	376	96.6	1.69	0.193
No	0	635	99.3
Smoking history
Yes	1	350	97.9	1.42	0.233
No	0	661	98.8
Drinking history
Yes	1	258	98.8	1.09	0.297
No	0	753	98.4
Tumor length
≤ 2 cm	0	577	97.5	0.14	0.708
> 2 cm	1	434	96.9
Tumor location
Upper part of the stomach	1	90	97.4	0.57	0.752
Mid-stomach	2	193	98.1
Lower part of the stomach	3	728	98.2
Tumor invasion depth
Mucosal lining	0	446	98.0	3.39	0.066
Submucosa	1	565	96.6
Vasculatogenic cancer thrombus
No	0	166	97.8	5.26	0.022
Yes	1	845	94.4
Nerve invasion
No	0	45	98.8	0.30	0.587
Yes	1	966	95.1
Degree of tumor differentiation
Low differentiation	1	501	97.7	4.21	0.122
Medium differentiation	2	296	97.6
High differentiation	3	214	95.6
Lymph node metastases
No	0	772	97.9	7.11	0.008
Yes	1	239	95.0

BMI: Body mass index.