Unsuspected efficacy of starch-based polysaccharide vs crystalloid-oil emulsion for lifting in colonic endoscopic resections

Table 2 Clinical/endoscopic data of study cases, n (%)

Outcome	Submucosal injection group
	Starch-based polysaccharide solution group	Crystalloid-oil emulsion solution group	χ2 statistic	P value
Polypectomy technique
Endoscopic mucosal resection	75/99 (75.7)	73/79 (92.4)	8.69	< 0.01
Endoscopic submucosal dissection	24/99 (24.2)	6/79 (7.6)
Polyp location
Right colon	63/99 (63.6)	42/79 (53.2)	1.99	0.16
Left colon	36/99 (36.3)	37/79 (46.8)
Polyp size
< 2 cm	28/99 (28.2)	26/79 (32.9)	3.21	0.20
2-4 cm	45/99 (45.5)	41/79 (51.9)
≥ 4 cm	26/99 (26.2)	12/79 (15.2)
Quality of lift
Adequate	71/99 (71.7)	57/79 (72.2)	1.30	0.52
Not adequate	12/99 (12.1)	13/79 (16.5)
Not reported	16/99 (16.6)	9/79 (11.4)
Polypectomy resection
En bloc	32/99 (32.3)	8/79 (10.1)	12.43	< 0.01
Piecemeal	67/99 (67.7)	71/79 (89.9)
Intraprocedural bleeding requiring intervention
Yes	20/99 (20.2)	35/79 (44.3)	11.95	< 0.01
No	79/99 (79.8)	44/79 (55.7)
30-day adverse events
Rectal bleeding	2/99 (2.0)	7/79 (8.9)	6.65	< 0.01
Bowel perforation	0/99 (0.0)	2/79 (2.5)

P values were derived from χ² tests comparing the occurrence of each outcome between the two study groups.