Endoscopic mucosal resection-precutting vs conventional endoscopic mucosal resection for sessile colorectal polyps sized 10-20 mm

Table 1 Baseline characteristics of the study population

Characteristic	EMR-P (n = 110), %	CEMR (n = 110), %	P value
Male (%)	67 (60.9)	70 (63.6)	0.676
Mean age (yr, ± SD)	60.4 ± 10.4	59.9 ± 11.5	0.735
Height (cm)	164.4 ± 7.7	165.0 ± 7.5	0.566
Weight (kg)	61.4 ± 10.5	63.5 ± 10.7	0.151
Location, n (%)			0.725
Cecum	6 (5.5)	5 (4.5)
Ascending	19 (17.3)	18 (16.4)
Transverse	24 (21.8)	28 (25.5)
Descending	7 (6.4)	9 (8.2)
Sigmoid	26 (23.6)	31 (28.2)
Rectum	28 (25.5)	19 (17.3)
Morphology, n (%)			0.858
0-Ip	3 (2.7)	3 (2.7)
0-Is	36 (32.7)	42 (38.2)
0-IIa	68 (61.8)	62 (56.4)
0-IIb	2 (1.8)	3 (2.7)
0-IIc	1 (0.9)	0 (0.0)
Institution, n (%)			0.570
A	16 (14.5)	9 (8.2)
B	31 (28.2)	28 (25.5)
C	6 (5.5)	5 (4.5)
D	19 (17.3)	16 (14.5)
E	9 (8.2)	14 (12.7)
F	13 (11.8)	18 (16.4)
G	16 (14.5)	20 (18.2)
Tumor size (mm)	14.0 ± 3.7	13.1 ± 3.1	0.055
Operator experience, n (%)			0.072
Experienced endoscopist	109 (99.1)	103 (93.6)
Non-experienced endoscopist	1 (0.9)	7 (6.4)

Institution A: The First Affiliated Hospital, College of Medicine, Zhejiang University, China; Institution B: Renmin Hospital of Yuyao City, Zhejiang, China; Institution C: Jinhua Municipal Central Hospital, Zhejiang, China; Institution D: Taizhou Hospital, Zhejiang, China; Institution E: The Central Hospital of Lishui City, Zhejiang, China; Institution F: Ningbo Medical Center, Lihuili Hospital, Zhejiang, China; Institution G: Ningbo First Hospital, Zhejiang, China. EMR-P: Endoscopic mucosal resection with circumferential precutting; CEMR: Conventional endoscopic mucosal resection.