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

Table 2 Risk factors for lymph node metastasis in intramucosal gastric cancer (n = 1340) by univariate analysis n (%)

	Negative	Positive	P value
Gender			0.217
Male/female	843/458	29/10
Age	58.5 ± 11.8	50.6 ± 14.5	< 0.001
Size of tumor (mm, mean ± SD)	23.5 ± 15.7	37.9 ± 28.6	< 0.001
Tumor size			< 0.001
≤ 30 mm	961 (81)	18 (54)
> 30 mm	224 (19)	15 (46)
Tumor location			0.052
Upper	192 (15)	14 (36)
Middle	736 (59)	19 (48)
Lower	324 (26)	6 (16)
Lauren			< 0.001
Intestine type	634 (61)	11 (38)
Diffuse type	371 (36)	16 (55)
Mix type	33 (3)	2 (7)
Histologic type			0.715
Differentiated	799 (62)	20 (53)
Undifferentiated	498 (38)	18 (47)
Ulcer finding			0.757
Absence/presence	619/550	14/14
Lymphatic invasion			< 0.001
Absence/presence	1202/93	23/15
Vascular invasion			< 0.001
Absence/presence	1272/22	22/17
Perineural invasion			< 0.001
Absence/presence	1279/13	36/3