Prognostic impact of dissected lymph node count on patients with node-negative gastric cancer

Table 1 Univariate analysis of variables in patients with node-negative gastric cancer

Characteristics	n	5-year survival rate (%)	χ2	P value
Gender			1.887	0.170
Male	164	81.7
Female	47	84.0
Age (yr)			0.619	0.431
< 60	109	84.2
≥ 60	102	79.9
Tumor size (cm)			4.538	0.033
≤ 4	94	88.9
> 4	117	76.8
Tumor location			1.681	0.432
Upper	75	80.1
Middle	40	81.7
Lower	96	84.0
Depth of invasion			27.698	0.000
T1	69	92.4
T2	58	83.9
T3	62	76.4
T4	22	57.8
Pathology			0.212	0.645
Differentiated	55	88.6
Undifferentiated	156	80.0
Surgical type			0.219	0.640
Total gastrectomy	99	80.5
Subtotal gastrectomy	112	83.6
Number of resected LNs			45.219	0.000
0-14	18	43.2
15-19	49	76.8
20-24	63	84.5
25-29	44	90.6
≥ 30	37	94.5