Table 6.

Correlation between lymph node metastases at pN1 and pN2 and clinicopathological factors

	pN1			pN2
	-	+	P	-	+	P
Tumor size (cm)			0.24			0.295
≤ 2.0	86 (88.7)	11 (11.3)		95 (97.9)	2 (2.1)
> 2.0	87 (82.9)	18 (17.1)		100 (95.2)	5 (4.8)
Macroscopic type			0.969			0.259
Elevated	21 (84.0)	4 (16.0)		24 (96.0)	1 (4.0)
Flat	18 (85.7)	3 (14.3)		19 (90.5)	2 (9.5)
Depressed	134 (85.9)	22 (14.1)		152 (97.4)	4 (2.6)
Invasion depth			0.008			0.334
Mucosal	111 (91.0)	11 (9.0)		119 (97.5)	3 (2.5)
Submucosal	62 (77.5)	18 (22.5)		76 (95.0)	4 (5.0)
Differentiate			0.332			0.349
Differentiated	106 (87.6)	15 (12.4)		118 (97.5)	3 (2.5)
Undifferentiated	67 (82.7)	14 (17.3)		77 (95.1)	4 (4.9)
Lymphovascular invasion			0.126			0.804
No	174 (87.0)	26 (13.0)		194 (97.0)	6 (3.0)
Yes	1 (50.0)	1 (50.0)		2 (100.0)	0 (0.0)