title: A clear liquid diet is not mandatory for polyethylene glycol-based bowel preparation for afternoon colonoscopy in healthy outpatients.
abstract: OBJECTIVE
  A dietary regimen consisting of a clear liquid diet (CLD) for at least 24 hours is recommended for colonoscopy preparation. However, this requirement results in problems in patient compliance with bowel preparation. The aim of this study was to evaluate the efficacy of a CLD compared with a regular diet (RD) for colonoscopy preparation using a polyethylene glycol (PEG) solution.
  
  
  METHODS
  This was a multicenter, randomized, investigator-blind prospective study. A total of 801 healthy outpatients undergoing afternoon colonoscopy were randomized to either a CLD or RD in addition to a 4 L PEG regimen.
  
  
  RESULTS
  The quality of bowel cleansing was not different between the CLD and RD groups in terms of the proportion with excellent or good preparation. In addition, no significant differences were observed between the two groups for polyp and adenoma detection rates and overall adverse events. Good compliance with bowel preparation was higher in the RD group than in the CLD group.
  
  
  CONCLUSIONS
  A CLD for a full day prior to colonoscopy should not be mandatory for PEG-based bowel preparation. Dietary education concerning the avoidance of high-fiber foods for 3 days before colonoscopy is sufficient, at least for healthy outpatients.
authors: Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors: Yoon Suk
authors: YS
authors: Jung
authors: Hyo Sun
authors: HS
authors: Seok
authors: Dong Il
authors: DI
authors: Park
authors: Chang Seok
authors: CS
authors: Song
authors: Seong Eun
authors: SE
authors: Kim
authors: Suck Ho
authors: SH
authors: Lee
authors: Chang Soo
authors: CS
authors: Eun
authors: Dong Soo
authors: DS
authors: Han
authors: Yong Soo
authors: YS
authors: Kim
authors: Chang Kyun
authors: CK
authors: Lee
mesh_terms: D000236:Adenoma / Q000175:diagnosis*; D000328:Adult; D000368:Aged; D000553:Ambulatory Care; D002400:Cathartics / Q000008:administration & dosage; D003110:Colonic Neoplasms / Q000175:diagnosis*; D003111:Colonic Polyps / Q000175:diagnosis; D003113:Colonoscopy / Q000379:methods*; D004032:Diet / Q000009:adverse effects; D004043:Dietary Fiber / Q000008:administration & dosage; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D061646:Operative Time; D010349:Patient Compliance; D010353:Patient Education as Topic; D011092:Polyethylene Glycols / Q000008:administration & dosage; D016037:Single-Blind Method; D013997:Time Factors
chemical_list: D002400:Cathartics; D004043:Dietary Fiber; D011092:Polyethylene Glycols
keywords: Afternoon colonoscopy; Bowel preparation; Clear liquid diet; Regular diet