Rate of adverse events of gastroduodenal snare polypectomy for non-flat polyp is low: A prospective and multicenter study

Table 5 Univariate analysis of bleeding risk factors n (%)

	Bleeding, n = 30	No bleeding, n = 278	P value
Age (yr), mean ± SD	69.5 ± 10	69.1 ± 12	0.137
Gender			0.634
Male	12 (40)	99 (35.6)
Female	18 (60)	179 (64.4)
Anticoagulation1			0.217
Yes	14 (46.7)	98 (35.2)
No	16 (53.3)	180 (64.7)
ASA			0.515
I, II	20 (66.7)	201 (72.3)
III, IV	10 (33.3)	77 (27.7)
Paris classification of polyps1
0-Ip	17 (56.7)	135 (48.6)	0.399
0-Is	13 (43.3)	143 (51.4)
Polyp size1			< 0.036
≤ 10 mm	7 (23)	120 (43.2)
> 10 mm	23 (77)	158 (56.8)
Location			0.557
Stomach	28 (93.3)	266 (95.7)
Duodenum	2 (6.7)	12 (4.3)
Polyp histology1			0.092
Hyperplastic	18 (60)	206 (74.4)
Others	12 (40)	72 (25.6)
Polyp with dysplasia			0.053
Yes	8 (26.7)	36 (13.4)
No	22 (73.3)	232 (86.6)
Physician expertise1			< 0.026
Staff	30 (100)	238 (85.6)
Fellow	0 (0)	40 (14.4)
University hospital			0.207
Yes	27 (90)	224 (80.6)
No	3 (10)	54 (19.4)
Number of polyps resected			0.989
One	20 (66.7)	185 (66.5)
More than one	10 (33.3)	93 (33.4)
Use of endocut1			0.068
Yes	27 (90)	209 (75.2)
No	3 (10)	69 (24.8)
Hemorrhage prophylaxis1			0.479
Yes	23 (76.7)	196 (70.5)
No	7 (23.3)	82 (29.5)

¹Clinically relevant variables that have been included in the multivariate analysis.