Orthodontic Rubber Band-Assisted Endoscopic Submucosal Dissection: An Efficient Method for Treating Superficial Colorectal Tumors

Table 3

Variables included in the propensity score matching, and treatment outcomes in the matched groups.

	ORB-ESD group ()	Conventional ESD group ()	value
Gross type, (%)			1^F
Polypoid	4 (12.9)	5 (16.1)
Superficial	27 (87.1)	26 (83.9)
Lesion location, (%)			0.848^C
Right colon	15 (48.4)	13 (41.9)
Left colon	5 (16.1)	7 (22.6)
Rectum	11 (35.5)	11 (35.5)
Lesion size (mm)	20 (20–27.5)	21 (20–25)	0.988^W
Procedure time (min)	35 (26–42)	50 (42–64)	0.001^W
Fibrosis, (%)	0 (0)	1 (3.2)	0.344^F
Operator experiences, (%)			1^C
Expert	12 (38.7)	13 (41.9)
Trainee	19 (61.3)	18 (58.1)
Complications, (%)			1^F
Delayed bleeding	1 (3.2)	0 (0)
Perforation	1 (3.2)	1 (3.2)
En bloc resection, (%)	31 (100)	31 (100)	1^F
R0 resection, (%)	30 (96.8)	29 (93.5)	1^F

ORB: orthodontic rubber band; ESD: endoscopic submucosal dissection. ^FFisher’s exact test, ^Cchi-squared test, ^WMann-Whitney test.