Efficacy and safety of pretraction-assisted endoscopic submucosal dissection for treating rectal neuroendocrine tumors

Table 2 Clinical outcomes in the pretraction-assisted endoscopic submucosal dissection and conventional pretraction-assisted endoscopic submucosal dissection groups, n (%)

	p-ESD group (n = 49)	c-ESD group (n = 54)	P value
Dissection time, minutes	9.03 (7.0-12.3)	14.9 (11.0-20.5)	< 0.0011
En bloc resection	49 (100)	54 (100)	1.000
R0 resection	49 (100)	48 (88.9)	0.0282
Adverse events
Minor intraoperative bleeding	5 (10.2)	14 (25.9)	0.040
Major intraoperative bleeding	2 (4.1)	10 (18.5)	0.0302
Delayed bleeding	0 (0.0)	2 (3.7)	0.4962
Muscularis propria injury	0 (0.0)	9 (16.7)	0.0032
Intraoperative perforation	0 (0.0)	3 (5.6)	0.2442
Delayed perforation	0 (0.0)	0 (0.0)	-
Tumor recurrence	0 (0.0)	0 (0.0)	-

¹Mann-Whitney U test.

²Fisher’s exact test.

p-ESD: Pretraction-assisted endoscopic submucosal dissection; c-ESD: Conventional pretraction-assisted endoscopic submucosal dissection.