title: Value of EGD in patients referred for cholecystectomy: a systematic review and meta-analysis.
abstract: BACKGROUND
  As many as 33% of patients with symptomatic cholelithiasis report persisting abdominal pain after cholecystectomy, suggesting alternative causes of these symptoms. EGD may serve as a tool to identify additional symptomatic abdominal disorders beforehand to avoid unnecessary gallbladder surgery. There is controversy as to whether routine EGD before cholecystectomy is appropriate.
  
  
  OBJECTIVE
  To perform a systematic review and meta-analysis to assess the value of EGD before cholecystectomy.
  
  
  METHODS
  A systematic literature search was conducted to identify studies that reported the proportion of patients who were referred for cholecystectomy, but in whom initial surgery could be avoided after treatment of abnormalities detected with EGD. Pooled estimates with 95% confidence intervals (CIs) were calculated by using random-effects models.
  
  
  METHODS
  Meta-analysis of 12 cohort studies.
  
  
  METHODS
  A total of 6317 patients with cholelithiasis underwent EGD.
  
  
  RESULTS
  The pooled estimate of abnormalities detected with EGD was 36.3% (95% CI, 28.0-45.0). In a total of 3.8% (95% CI, 1.4-7.6) of patients referred for cholecystectomy who underwent previous EGD, gallbladder surgery was avoided.
  
  
  CONCLUSIONS
  Lack of information regarding characteristics of patients referred for cholecystectomy, criteria for performing EGD, algorithms for the treatment of identified pathologies, and response criteria for the decision to avoid cholecystectomy in included studies.
  
  
  CONCLUSIONS
  Our study indicates that, despite the high diagnostic yield of EGD, its value as a tool to prevent gallbladder surgery is limited. EGD should only be considered selectively in patients with cholelithiasis referred for cholecystectomy.
authors.affiliation: Scientific Institute for Quality of Healthcare (IQ Healthcare), Radboud University Medical Center, Nijmegen, the Netherlands; Department of Surgery, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, the Netherlands.
authors.forename: Mark P
authors.initials: MP
authors.lastname: Lamberts
authors.affiliation: Department of Health Evidence, Radboud University Medical Center, Nijmegen, the Netherlands.
authors.forename: Wietske
authors.initials: W
authors.lastname: Kievit
authors.affiliation: Department of Health Evidence, Radboud University Medical Center, Nijmegen, the Netherlands.
authors.forename: Cihan
authors.initials: C
authors.lastname: Özdemir
authors.affiliation: Scientific Institute for Quality of Healthcare (IQ Healthcare), Radboud University Medical Center, Nijmegen, the Netherlands.
authors.forename: Gert P
authors.initials: GP
authors.lastname: Westert
authors.affiliation: Department of Surgery, Radboud University Medical Center, Nijmegen, the Netherlands.
authors.forename: Cornelis J H M
authors.initials: CJ
authors.lastname: van Laarhoven
authors.affiliation: Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, the Netherlands.
authors.forename: Joost P H
authors.initials: JP
authors.lastname: Drenth
mesh_terms: D015746:Abdominal Pain / Q000209:etiology*; D002763:Cholecystectomy; D002769:Cholelithiasis / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D016145:Endoscopy, Digestive System; D005767:Gastrointestinal Diseases / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D011300:Preoperative Care / Q000379:methods*; D019564:Unnecessary Procedures