title: What can be the criteria of outpatient-based endoscopic resection for colon polyp?
abstract: OBJECTIVE
  To investigate whether out-patient based endoscopic mucosal resection (EMR) for colon polyps ≤ 10 mm is safe.
  
  
  METHODS
  Between January 2004 and December 2012, a total of 3015 EMR cases conducted in 1320 patients were retrospectively reviewed. The factors contributing delayed hemorrhage were analyzed. We calculated the probability of delayed bleeding after stratifying conditions of specific risk factors.
  
  
  RESULTS
  The size of the polyp (95%CI: 1.096-1.164, P < 0.001) and patients with chronic renal failure (95%CI: 1.856-45.106, P = 0.007) were identified as independent risk factors for delayed bleeding in multivariate analysis. 95%CI for percent of delayed bleeding according to polyp size was determined for the following conditions: size ≤ 10 mm, 0.05%-0.43%; 20 mm ≥ size > 10 mm, 0.54%-2.08%; size > 20 mm, 4.22%-11.41%. 95%CI was determined for the risk of serious immediate bleeding for a polyp ≤ 10 mm was 0.10%-0.56%. Finally, 95%CI for percent of incomplete resection was 0.07%-0.49% in polyps ≤ 10 mm.
  
  
  CONCLUSIONS
  It seems acceptable to perform outpatient-based EMR for colon polyps ≤ 10 mm.
authors.affiliation: Hyung Hun Kim, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul 137-701, South Korea.
authors.forename: Hyung Hun
authors.initials: HH
authors.lastname: Kim
authors.affiliation: Hyung Hun Kim, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul 137-701, South Korea.
authors.forename: Sung Eun
authors.initials: SE
authors.lastname: Kim
authors.affiliation: Hyung Hun Kim, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul 137-701, South Korea.
authors.forename: Eun Joo
authors.initials: EJ
authors.lastname: Cho
keywords: Bleeding; Colon; Endoscopic mucosal resection; Polyp