Lymph node metastasis in early gastric cancer with submucosal invasion: Feasibility of minimally invasive surgery

Table 2 Relationship between clinicopathological factors and lymph node metastasis

	Total	Node-negative	Node-positive (n, %)	P
Sex
M	74	57	17 (23.0)	0.965
F	31	24	17 (22.6)
Age (yr)	105	54.8 ± 12.5	55.4 ± 12.2	0.822
Tumor location
Upper	1	1	0 (0)	0.614
Middle	53	42	11 (20.8)
Lower	48	35	13 (27.1)
Entire	3	3	0 (0)
Gross appearance
Elevated	23	15	8 (34.8)	0.055
Flat	6	3	3 (50.0)
Depressed	76	63	13 (17.1)
Tumor differentiation
Differentiated	47	35	12 (25.5)	0.557
Undifferentiated	58	46	12 (20.7)
Lauren’s classification
Intestinal	44	35	9 (20.5)	0.572
Diffuse	53	41	12 (22.6)
Mixed	8	5	3 (37.5)
Depth of invasion
SM1	28	24	4 (14.3)	0.448
SM2	47	35	12 (25.5)
SM3	30	22	8 (26.7)
Lymphatic invasion
Absence	86	69	17 (19.8)	0.109
Presence	19	12	7 (36.8)