Self-expanding metal stent placement and pathological alterations among obstructive colorectal cancer cases

Table 6 Pathological features of patients with colorectal cancer according to decompression methods (transanal tube vs 18-mm stent vs 22-mm stent)

Characteristic1	All cases (n = 102)	Decompression methods			P value2,3
		Transanal tube (n = 76)	18 mm stent (n = 11)	22 mm stent (n = 15)
Lymphatic invasion, n (%)					0.055 (0.0060)
Absent	11 (11)	10 (13)	1 (9.1)	-
Minimal	41 (40)	33 (43)	5 (45)	3 (20)
Moderate	32 (31)	23 (30)	4 (36)	5 (33)
Severe	18 (18)	10 (13)	1 (9.1)	7 (47)
Venous invasion, n (%)					< 0.0001 (0.0006)
Absent	19 (19)	17 (22)	2 (18)	-
Minimal	45 (44)	37 (49)	3 (27)	5 (33)
Moderate	23 (23)	19 (25)	1 (9.1)	3 (20)
Severe	15 (15)	3(4.0)	5 (45)	7 (47)

¹Percentage indicates the proportion of patients with a specific clinical characteristic among all patients or in strata of decompression methods.

²We used the chi-square test to compare as categorical variables. We adjusted the two-sided α level to 0.05.

³We used the Mann-Whitney U test to compare as nonparametric continuous variables. We adjusted the two-sided α level to 0.05.