Impact of lymphatic and/or blood vessel invasion in stage II gastric cancer

Table 1 Clinicopatholgical factors according to lymphatic and/or blood vessel invasion n (%)

Clinicopathological factors	Tumor without lymphovascular invasion	Tumor with lymphovascular invasion	P value
Patients	314	122
Age (yr)	58.95 ± 11.88	58.84 ± 10.66	0.927
Sex
Male	235 (74.8)	85 (69.7)	0.279
Female	79 (25.2)	37 (30.3)
Tumor location
Upper	110 (35.0)	42 (34.4)	0.733
Middle	57 (18.2)	20 (16.4)
Lower	140 (44.6)	55 (45.1)
Whole	7 (2.2)	5 (4.1)
Resection type
Subtotal	236 (75.2)	87 (71.3)	0.465
Total	78 (24.8	35 (28.7)
Tumor size (cm)
< 5 cm	206 (65.6)	82 (67.2)	0.822
≥ 5 cm	108 (34.4)	40 (32.8)
Histological type
Differentiated	123 (39.2)	54 (44.3)	0.331
Undifferentiated	191 (60.8)	68 (55.7)
No. of retrieved LNs	21.5 ± 5.5	22.3 ± 7.0	0.248
LN
Positive	96 (30.6)	51 (41.8)	0.032
Negtive	218 (69.4)	71 (58.2)
Stage			< 0.001
IIa	264 (84.1)	70 (57.4)
IIb	50 (15.9)	52 (42.6)
Survival at 5 yr (%)	39.6	54.8	0.006

LN: Lymph node.