Prediction of the indication criteria for endoscopic resection of early gastric cancer

Table 3 Risk factors for lymph node metastasis in submucosal gastric cancer (n = 930) by univariate analysis n (%)

	Negative	Positive	P value
Gender			0.369
Male/female	497/254	119/60
Age	61.0 ± 11.3	60.2 ± 11.4	< 0.001
Size of tumor (mm, mean ± SD)	27.0 ± 14.8	36.1 ± 19.9	< 0.001
Tumor size			< 0.001
≤ 20 mm	512 (73)	94 (55)
> 20 mm	188 (27)	76 (45)
Tumor location			0.651
Upper	157 (21)	34 (20)
Middle	376 (50)	93 (52)
Lower	223 (29)	52 (28)
Lauren			0.514
Intestine type	343 (56)	69 (47)
Diffuse type	215 (35)	63 (43)
Mix type	52 (9)	16 (10)
Histologic type			0.884
Differentiated	489 (65)	113 (63)
Undifferentiated	258 (35)	66 (37)
Ulcer finding			0.115
Absence/presence	255/388	51/104
Lymphatic invasion			< 0.001
Absence/presence	526/222	47/130
Vascular invasion			< 0.001
Absence/presence	665/82	104/71
Perineural invasion			0.103
Absence/presence	693/56	157/22