Table 4.

Endoscopic position during submucosal dissection after propensity score matching

	CWL-ESD	SLC-ESD	P
Total	n = 42	n = 42	0.266
Retroflexed endoscopic position	19 (45.2)	14 (33.3)
Forward endoscopic position	23 (54.8)	28 (66.7)
Lesion location
Upper	n = 8	n = 9	1.000
Retroflexed endoscopic position	3 (37.5)	3 (33.3)
Forward endoscopic position	5 (62.5)	6 (66.7)
Middle	n = 21	n = 21	0.536
Retroflexed endoscopic position	13 (61.9)	10 (47.6)
Forward endoscopic position	8 (38.1)	11 (52.4)
Lower	n = 13	n = 12	0.593
Retroflexed endoscopic position	3 (23.1)	1 (8.3)
Forward endoscopic position	10 (76.9)	11 (91.7)

Values are n (%) unless otherwise indicated

CWL-ESD clip with line-assisted endoscopic submucosal dissection, SLC-ESD spring and loop with clip-assisted endoscopic submucosal dissection