Table 5 Subgroup analysis of T1 tumor according to Slug expression

From: Evaluation of Slug expression is useful for predicting lymph node metastasis and survival in patients with gastric cancer

	Total	Slug expression		P
	Total	Negative (n = 13)	Positive (n = 107)	P
Tumor depth
T1a	56	6 (46.2%)	50 (46.7%)	0.969
T1b	64	7 (53.8%)	57 (53.5%)
Tumor size	3.0 ± 1.9	2.7 ± 2.0	3.0 ± 1.9	0.670
Histology
Adenocarcinoma, WD	25	0 (0.0%)	25 (23.4%)	0.001^a
Adenocarcinoma, MD	37	3 (23.1%)	34 (31.8%)
Adenocarcinoma, PD	31	2 (15.4%)	29 (27.1%)
Signet ring cell cancer	27	8 (61.5%)	19 (17.8%)
Lymph node metastasis
Negative	103	13 (100%)	90 (84.1%)	0.210^b
Positive	17	0 (0.0%)	17 (15.9%)

WD well differentiated, MD moderately differentiated, PD poorly differentiated
^aLinear-by-linear association
^bFisher’s exact test

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