title: Split-Dose Polyethylene Glycol Is Superior to Single Dose for Colonoscopy Preparation: Results of a Randomized Controlled Trial.
abstract: Background. The efficacy of colonoscopy in detecting abnormalities within the colon is highly dependent on the adequacy of the bowel preparation. The objective of this study was to compare the efficacy, safety, and tolerability of PEG lavage and split-dose PEG lavage with specific emphasis on the cleanliness of the right colon. Methods. The study was a prospective, randomized, two-arm, controlled trial of 237 patients. Patients between the age of 50 and 75 years were referred to an outpatient university screening clinic for colonoscopy. Patients were allocated to receive either a single 4 L PEG lavage or a split-dose PEG lavage. Results. Overall, the bowel preparation was superior in the split-dose group compared with the single-dose group (mean Ottawa score 3.50 ± 2.89 versus 5.96 ± 3.53; P < 0.05) and resulted in less overall fluid in the colon. This effect was observed across all segments of the colon assessed. Conclusions. The current study supports use of a split-dose PEG lavage over a single large volume lavage for superior bowel cleanliness, which may improve polyp detection. This trial is registered with ClinicalTrials.gov identifier NCT01610856.
authors.affiliation: Division of Gastroenterology, Faculty of Medicine, University of Calgary, Calgary, AB, Canada.
authors.forename: Rachid
authors.initials: R
authors.lastname: Mohamed
authors.affiliation: Departments of Medicine and Community Health Sciences, University of Calgary, Calgary, AB, Canada; Forzani & MacPhail Colon Cancer Screening Centre, Alberta Health Services, Calgary, AB, Canada.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Hilsden
authors.affiliation: Division of Gastroenterology, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.
authors.forename: Catherine
authors.initials: C
authors.lastname: Dube
authors.affiliation: Division of Gastroenterology, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.
authors.forename: Alaa
authors.initials: A
authors.lastname: Rostom
mesh_terms: D000368:Aged; D000416:Alberta; D002400:Cathartics / Q000008:administration & dosage*; D003106:Colon / Q000187:drug effects; D003113:Colonoscopy; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011092:Polyethylene Glycols / Q000008:administration & dosage*; D011292:Premedication / Q000379:methods*; D011446:Prospective Studies; D016896:Treatment Outcome
chemical_list: D002400:Cathartics; D011092:Polyethylene Glycols