title: Video on Diet Before Outpatient Colonoscopy Does Not Improve Quality of Bowel Preparation: A Prospective, Randomized, Controlled Trial.
abstract: OBJECTIVE
  Successful outpatient colonoscopy (CLS) depends on many factors including the quality of a patient's bowel preparation. Although education on consumption of the pre-CLS purgative can improve bowel preparation quality, no study has evaluated dietary education alone. We have created an educational video on pre-CLS dietary instructions to determine whether dietary education would improve outpatient bowel preparation quality.
  
  
  METHODS
  A prospective randomized, blinded, controlled study of patients undergoing outpatient CLS was performed. All patients received a 4 l polyethylene glycol-based split-dose bowel preparation and standard institutional pre-procedure instructions. Patients were then randomly assigned to an intervention arm or to a no intervention arm. A 4-min educational video detailing clear liquid diet restriction was made available to patients in the intervention arm, whereas those randomized to no intervention did not have access to the video. Patients randomized to the video were provided with the YouTube video link 48-72 h before CLS. An attending endoscopist blinded to randomization performed the CLS. Bowel preparation quality was scored using the Boston Bowel Preparation Scale (BBPS). Adequate preparation was defined as a BBPS total score of ≥6 with all segment scores ≥2. Wilcoxon rank-sum and Pearson's χ2-tests were performed to assess differences between groups.
  
  
  RESULTS
  Ninety-two patients were randomized (video: n=42; control: n=50) with 47 total video views being tallied. There were no demographic differences between groups. There was no statistically significant difference in adequate preparation between groups (video=74%; control=68%; P=0.54).
  
  
  CONCLUSIONS
  The availability of a supplementary patient educational video on clear liquid diet alone was insufficient to improve bowel preparation quality when compared with standard pre-procedure instruction at our institution.
authors.affiliation: Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA.
authors.forename: Sean C
authors.initials: SC
authors.lastname: Rice
authors.affiliation: Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA.
authors.forename: Tina
authors.initials: T
authors.lastname: Higginbotham
authors.affiliation: Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA.
authors.forename: Melanie J
authors.initials: MJ
authors.lastname: Dean
authors.affiliation: Department of Biostatistics, Vanderbilt University, Nashville, Tennessee, USA.
authors.forename: James C
authors.initials: JC
authors.lastname: Slaughter
authors.affiliation: Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA.
authors.forename: Patrick S
authors.initials: PS
authors.lastname: Yachimski
authors.affiliation: Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA.|Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee, USA.
authors.forename: Keith L
authors.initials: KL
authors.lastname: Obstein
mesh_terms: D000368:Aged; D000553:Ambulatory Care; D001296:Audiovisual Aids; D002400:Cathartics / Q000627:therapeutic use*; D003113:Colonoscopy; D004035:Diet Therapy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010353:Patient Education as Topic / Q000379:methods*; D011092:Polyethylene Glycols / Q000627:therapeutic use; D016037:Single-Blind Method; D014741:Video Recording
chemical_list: D002400:Cathartics; D011092:Polyethylene Glycols