Table 2: The characteristics of the patients and lesions and the endoscopic resection-associated factors in the clipping and nonclipping groups.

ClippingNonclipping value

Numbers of lesions in male and female patientsMale10999N.S.
Female4535

Age (mean SE)67.1 ± 867.8 11N.S.

LocationRectum1116N.S.
Others143118

MorphologyPedunculated2813N.S.
Sessile and flat127122

Size (cm)<19886N.S.
1, <24842N.S.
286N.S.

Anticoagulant drugs+62N.S.
148132

Antiplatelet drugs+1919N.S.
135115

Treatment methodEMR131103N.S.
Polypectomy2331

Exposed vessel+52N.S.
149132

Length of procedure
(second; mean SE)
528 559281 263<0.01

Specialists
Less-experienced endoscopists
+8790N.S.
6843

Bleeding+43N.S.
150131

N.S.: not significant.
EMR: endoscopic mucosal resection.
Exposed vessel: obvious vessels in the ulceration after endoscopic resection.