Effects of extended lymphadenectomy and postoperative chemotherapy on node-negative gastric cancer

Table 1 Clinicopathologic factors of patients with node-negative gastric cancer

Characteristics	n	5-yr survival rate	χ2	P value
Gender			1.416	0.234
Male	230	67.40%
Female	81	72.80%
Age (yr)			4.979	0.026
< 65	156	75.20%
≥ 65	155	62.40%
Tumor size (cm)			5.930	0.015
≤ 4	166	73.80%
> 4	145	63.00%
Tumor location			8.721	0.033
Upper	103	58.70%
Middle	45	67.90%
Lower	150	76.50%
Total	13	68.40%
Borrmann type			3.834	0.280
I	60	71.60%
II	129	74.20%
III	108	62.80%
IV	14	57.10%
Depth of invasion			13.676	0.001
T1	22	100.00%
T2	69	78.40%
T3	220	62.20%
Pathology			2.689	0.101
Differentiated	124	73.90%
Undifferentiated	187	65.30%

Table 2 Major postoperative complications observed in the study

Type of complications	15-24 LNs removed (n = 189)	Above 25 LNs removed (n = 122)	χ2	P value
Pulmonary	16	13
Abdominal abscess	15	9
Pancreatic fistula	5	3
Anastomotic leak	2	2
Lymphorrhea	4	3
Paralytic ileus	2	2
Others	3	2
Total	47	34	0.347	0.556

LNs: Lymph nodes.