Study on the risk factors of lymphatic metastasis and the indications of less in vasive operations in early gastric cancer

Table 3 Lymphatic metastasis related to tumor size with or without ulcer (%)

Ulcer diameter(cm)	m Ca (n = 275)		sm Ca (n = 245)
	With ulcer(n = 111)	Without ulcer(n = 164)	With ulcer(n = 110)	Without ulcer(n = 135)
≤ 2	0 (0/43)	0 (0/79)	16.7 (3/18)	3.1 (1/32)
～3	0 (0/21)	2.4 (1/42)	20.8 (5/24)	21.1 (8/38)
～4	5.3 (1/19)	0 (0/15)	20.0 (4/20)	24.0 (6/25)
～5	6.7 (1/15)	0 (0/14)	18.8 (3/16)	18.2 (4/22)
≥ 6	1 (1/13)	0 (0/14)	43.8 (14/32)	33.3 (6/18)
Total No	2.7 (3/111)a	0.6 (1/164)	26.4 (29/110)a	18.5 (25/135)

^aP < 0.05, vs ulcer subgroup in each group.