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

Table 2 Perioperative features of patients with colorectal cancer according to decompression methods

Characteristic1	All cases (n = 102)	Decompression methods		P value2
		Transanal tube (n = 76)	SEMS (n = 26)
Operation method, n (%)				0.31
Open	54 (53)	38 (50)	16 (62)
Laparoscopy	48 (47)	38 (50)	10 (38)
Conversion to laparotomy, n (%)				0.072
Absent	47 (98)	38 (100)	9 (90)
Present	1 (2.1)	-	1 (10)
Procedure, n (%)				0.17
Colectomy	58 (57)	44 (58)	14 (54)
Anterior resection	37 (36)	25 (33)	12 (46)
Hartmann procedure	5 (4.9)	5 (6.6)	-
Abdominoperineal resection (Miles’ operation)	2 (2.0)	2 (2.6)	-
Lymph node dissection, n (%)				0.35
D1	3 (2.9)	3 (4.0)	-
D2	10 (9.8)	8 (11)	2 (7.7)
D3	89 (87)	65 (86)	24 (92)
Reconstruction (except 2 abdominoperineal resection cases), n (%)				0.011
Absent	10 (10)	10 (14)	-
Present	90 (90)	64 (86)	26 (100)
Number of harvested lymph nodes, mean ± SD	21.6 ± 12.0	21.5 ± 11.8	21.7 ± 12.6	0.97
Operation time, mean ± SD (min)	241 ± 80	234 ± 79	263 ± 79	0.12
Blood loss, mean ± SD (g)	224 ± 364	229 ± 375	212 ± 336	0.84
Clavien-Dindo classification, n (%)				0.22
0	78 (76)	58 (76)	20 (77)
1	5 (4.9)	5 (6.6)	-
2	11 (11)	8 (11)	3 (12)
3	7 (7.7)	5 (6.6)	2 (7.7)
4	-	-	-
5	1 (1.0)	-	1 (3.9)
Postoperative hospitalization, mean ± SD (days)	18.8 ± 15.1	19.3 ± 17.0	17.2 ± 6.7	0.53
Postoperative chemotherapy, n (%)				0.36
Absent	51 (50)	36 (47)	15 (58)
Present	51 (50)	40 (53)	11 (42)

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 categorical variables and analysis of variance to compare continuous variables. We adjusted the two-sided α level to 0.05.

SEMS: Self-expanding metal stent.