title: Predictors of double balloon endoscopy outcomes in the evaluation of gastrointestinal bleeding.
abstract: OBJECTIVE
  To identify patients' characteristics associated with double balloon endoscopy (DBE) outcomes in investigation of obscure gastrointestinal bleeding (OGIB).
  
  
  METHODS
  Retrospective study performed at an academic tertiary referral center. Evaluated endpoints were clinical factors associated with no diagnostic yield or non-therapeutic intervention of DBE performed for OGIB evaluation.
  
  
  RESULTS
  We included fifty-five DBE between August 2010 and April 2012. The mean age of the sample was 67 with 32 males (58.2%). Twenty-four DBE had no diagnostic yield and 30 DBE did not require therapy. Non-diagnostic yield was associated with performing two or more DBE studies in one day [odds ratio (OR): 13.72, P = 0.008], absence of blood transfusions within a year of the DBE (OR: 7.16, P = 0.03) and absence of ulcers or arteriovenous malformations (AVMs) on prior esophagogastroduodenoscopy (EGD) or colonoscopy (OR: 19.30, P = 0.033). Non-therapeutic DBE was associated with performing two or more DBE per day (OR: 18.579, P = 0.007), gastrointestinal bleeding episode within a week of the DBE (OR: 11.48, P = 0.003), fewer blood transfusion requirements prior to DBE (OR: 4.55, P = 0.036) and absence of ulcers or AVMs on prior EGD or colonoscopy (OR: 8.47, P = 0.027).
  
  
  CONCLUSIONS
  Predictors of DBE yield and therapeutic intervention on DBE include blood transfusion requirements, previous endoscopic findings and possibly endoscopist fatigue.
authors.affiliation: Hisham Hussan, Section of Intestinal Neoplasia and Hereditary Polyposis (INHP), Department of Gastroenterology, Hepatology and Nutrition, The Ohio State University Medical Center, Columbus, OH 43210, United States.
authors.forename: Hisham
authors.initials: H
authors.lastname: Hussan
authors.affiliation: Hisham Hussan, Section of Intestinal Neoplasia and Hereditary Polyposis (INHP), Department of Gastroenterology, Hepatology and Nutrition, The Ohio State University Medical Center, Columbus, OH 43210, United States.
authors.forename: Nicholas R
authors.initials: NR
authors.lastname: Crews
authors.affiliation: Hisham Hussan, Section of Intestinal Neoplasia and Hereditary Polyposis (INHP), Department of Gastroenterology, Hepatology and Nutrition, The Ohio State University Medical Center, Columbus, OH 43210, United States.
authors.forename: Caroline M
authors.initials: CM
authors.lastname: Geremakis
authors.affiliation: Hisham Hussan, Section of Intestinal Neoplasia and Hereditary Polyposis (INHP), Department of Gastroenterology, Hepatology and Nutrition, The Ohio State University Medical Center, Columbus, OH 43210, United States.
authors.forename: Soubhi
authors.initials: S
authors.lastname: Bahna
authors.affiliation: Hisham Hussan, Section of Intestinal Neoplasia and Hereditary Polyposis (INHP), Department of Gastroenterology, Hepatology and Nutrition, The Ohio State University Medical Center, Columbus, OH 43210, United States.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: LaBundy
authors.affiliation: Hisham Hussan, Section of Intestinal Neoplasia and Hereditary Polyposis (INHP), Department of Gastroenterology, Hepatology and Nutrition, The Ohio State University Medical Center, Columbus, OH 43210, United States.
authors.forename: Christine
authors.initials: C
authors.lastname: Hachem
keywords: Anemia; Arteriovenous malformations; Double balloon endoscopy; Enteroscopy; Obscure gastrointestinal bleeding; Small bowel