Table 1. Univariate analysis of patients by Kaplan-Meier method.

Variables	Case(n)	5-year survival (%)	χ 2	P value
Gender			0.095	0.758
Male	381	81.4
Female	111	83.5
Age(yr)			1.284	0.257
<60	255	84.2
≥60	237	79.4
Tumor size(cm)			13.586	0.000
<4.75	345	85.6
≥4.75	147	73.2
Depth of invasion			23.14	0.000
T1	158	92.3
T2	110	84.2
T3	101	75.5
T4a	123	71.2
Location			6.245	0.100
Upper third	147	79.4
Middle third	77	84.3
Lower third	228	84.8
Diffuse#	40	70.0
Borrmann type			4.979	0.026
I/II	238	86.0
III/IV	254	78.0
Histologic type †			0.013	0.908
Differentiated	231	82.9
Undifferentiated	261	81.0
Operation type *			0.110	0.740
Total	231	81.7
Subtotal	261	82.0

^#Diffuse, the location of tumor was more than two areas.

^†Graded according to Japanese Classification of Gastric Carcinoma.

Differentiated, papillary, or well/moderately differentiated tubular adenocarcinoma;

Undifferentiated, poorly differentiated, or mucinous adenocarcinoma or signet-ring cell carcinoma.

*Total, total gastrectomy;

Subtotal, subtotal gastrectomy (including proximal subtotal gastrectomy and distal subtotal gastrectomy).