Feasibility of cold snare polypectomy in Japan: A pilot study

Table 1 Baseline data of the participants (n = 61)

Male/female (%)	44 (72%)/17 (28%)
Median age	65
(range, yr)	(40-86)
Total detected lesion	234
Median detected lesion per patient (range)	3 (1-16)
Location
Cecum	19 (8%)
Ascending colon	61 (26%)
Transverse colon	56 (24%)
Descending colon	33 (14%)
Sigmoid colon	52 (22%)
Rectum	13 (6%)
Morphology
Protruded, sessile	205 (88%)
Superficial, elevated	29 (12%)
Median detected polyp size	4
(range, mm)	(1-9)
Endoscopist
Expert	79 (34%)
Senior resident	155 (66%)
Histological type
Not retrieved	28 (12%)
Non-neoplastic polyp	28 (12%)
Neoplastic polyp	176 (76%)
Horizontal margin (neoplastic lesion only)
HM 0	104 (59%)
HM 1	2 (1%)
HM X	70 (40%)

HM X: Tumor involvement of the lateral margin could not be assessed; HM 0: No tumor identified at the lateral margin; HM 1: Tumor identified at the lateral margin.

Table 2 Procedure-related outcomes

	Immediate bleeding(n = 8)	Non-immediate bleeding(n = 224)	P-value
Male/female	8/0	146/78	0.10a
Median age	64.5	68	0.27b
(range, years)	(50-76)	(40-86)
Location			0.40a
Proximal to splenic flexure	3 (38%)	132 (59%)
Distal from splenic flexure	5 (62%)	92 (41%)
Morphology			0.59a
Protruded, sessile (0-Is or Isp)	7 (88%)	196 (88%)
Flat, elevated (0-IIa)	1 (12%)	28 (12%)
Median size	7.5 (3-9)	4 (1-9)	0.002b
(range, mm)
≤ 5 mm (%)	2 (22%)	183 (82%)	0.001a
> 6 mm (%)	6 (78%)	41 (18%)
Endoscopist			0.54a
Expert	4 (50%)	74 (33%)
Senior resident	4 (50%)	150 (67%)
Histological type
Not retrieved	0 (0%)	28 (12.5%)
Non-neoplastic polyp	0 (0%)	28 (12.5%)	0.53a
Neoplastic polyp	8 (100%)	168 (75%)

^aYates’χ² test;

^bWilcoxon test.