Effectiveness and safety of modified cold snare polypectomy for flat colorectal polyps: A multicenter randomized controlled trial

Table 1 Comparison of patient characteristics between the modified cold snare polypectomy group and the conventional cold snare polypectomy group

Group	Example count	Age (year)	Gender (female/male)
Modified cold snare polypectomy group	75 (n = 151, patient-based)	55.81 ± 10.24	30/45
Conventional cold snare polypectomy group	76 (n = 151, patient-based)	57.18 ± 10.38	31/45
Statistical measure		t = -0.817 (t tests)	Z = -0.099 (Mann-Whitney U tests)
P value		0.415	0.922

Table 2 Comparison of polypectomy-related data between the modified cold snare polypectomy group and the conventional cold snare polypectomy group

Group	Modified cold snare polypectomy group	Conventional cold snare polypectomy group	Statistical measure	P value
Number of polyps (pcs)	95 (n = 184 polyp-based)	89 (n = 184 polyp-based)
Maximum polyps diameter (mm)	6 (6, 7)	6 (6, 7)	Z = -0.243	0.808
Polyps location (pcs)			Z = -0.569	0.569
Cecum	1	6
Ascending colon	14	14
Transverse colon	44	29
Descending colon	12	13
Sigmoid colon	24	26
Rectum	0	1
Pathological type (pcs)			Z = -1.952	0.051
Inflammatory polyps	4	4
Hyperplastic polyps	29	39
Sessile serrated lesions	2	1
Tubular adenomas	58	45
Villous tubular adenomas	2	0
En bloc resection rate (%)	98.947	92.135	Z = -2.258	0.024