Evaluation of efficacy and safety of different endoscopic polypectomy techniques for colonic polyps

Table 5 Resection rate, n (%)

Parameters	HFE (n = 107)	CSP (n = 106)	EMR (n = 108)	P1 value	P2 value	P3 value
En bloc resection4	91 (85.05)	95 (89.62)	77 (71.30)a,e	0.948	< 0.001	0.045
R0 resection5	87 (81.31)	65 (61.32)b	79 (73.14)	0.003	0.195	0.462
R1 resection6	20 (18.69)	22 (20.75)	30 (27.78)	2.115	0.693	0.345
Rx resection7	17 (15.89)	16 (15.09)	16 (14.81)	2.619	2.862	2.481
Ulcer base diameter one week after treatment (mm)	4.84 ± 1.02	3.19 ± 0.66c	3.52 ± 0.85c,d	< 0.001	0.006	< 0.001

¹High-frequency electroresection vs cold snare polypectomy.

²Cold snare polypectomy vs endoscopic mucosal resection.

³High-frequency electroresection vs endoscopic mucosal resection.

⁴Defined as a once-piece resection.

⁵Defined as en bloc resection with a histologically negative margin.

⁶Defined as a positive resection margin.

⁷Defined as an unknown resection status.

^aP < 0.05 vs high-frequency electroresection group.

^bP < 0.01 vs high-frequency electroresection group.

^cP < 0.001 vs high-frequency electroresection group.

^dP < 0.01 vs cold snare polypectomy group.

^eP < 0.001 vs cold snare polypectomy group.

HFE: High-frequency electroresection; CSP: Cold snare polypectomy; EMR: Endoscopic mucosal resection.