ArticleDigestive diseases and sciences2011
The timing of bowel preparation is more important than the timing of colonoscopy in determining the quality of bowel cleansing.
Article in Digestive diseases and sciences, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 38 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
The Bowel CLEAnsing: A National Initiative
Validation of a Novel Clinical Prediction Scoring System for Improved Bowel Preparation Prior to Outpatient Colonoscopy
Who cites it
38 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Effect of Bowel Preparation to Colonoscopy Interval on Preparation Quality and Colonoscopy Outcomes: A Meta-Analysis.The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology · 2023Pooled it
- Effect of bowel preparation completion time on bowel cleansing efficacy: Prospective randomized controlled trial of different bowel preparation completion times precolonoscopy.Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society · 2024Trial
- Split-dose low-volume polyethylene glycol is non-inferior but less preferred compared with same-day bowel preparation for afternoon colonoscopy.Nagoya journal of medical science · 2021Trial
- Evaluation of pH and residual gastric volume after colon preparation with mannitol: prospective randomized study comparing procedure performed after 3 hours versus 6 hours.Clinics (Sao Paulo, Brazil) · 2020Trial
- Trial
- Randomized clinical trial comparing fixed-time split dosing and split dosing of oral Picosulfate regimen for bowel preparation.World journal of gastroenterology · 2017Trial
- Trial
- Transenteral bowel preparation for colonoscopy is more comfortable than the traditional method with no inferiority in efficacy.Digestive diseases and sciences · 2015Trial
- Efficacy and tolerability of split-dose PEG compared with split-dose aqueous sodium phosphate for outpatient colonoscopy: a randomized, controlled trial.Digestive diseases and sciences · 2011Trial
- Efficacy, Safety, and Tolerance of Split Dose Oral Sulfate Solution Versus Split-Dose Polyethylene Glycol Versus Single Dose Polyethylene Glycol for Colonoscopy Preparation: A Prospective Randomized Study.Middle East journal of digestive diseases · 2025Article
- Day before late regimen vs standard split dose of low-volume PEG-CS for early morning colonoscopy: Multicenter randomized controlled trial.Endoscopy international open · 2025Article
- Factors affecting the quality of bowel preparation for colonoscopy in hard-to-prepare patients: Evidence from the literature.World journal of gastroenterology · 2023Review
- [Influencing factors for the quality of bowel preparation with polyethylene glycol electrolyte powder combined with diet control before colonoscopy in children].Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics · 2022Article
- Bowel cleansing efficacy for colonoscopy: prospective, randomized comparative study of same-day dosing with 1-L and 2-L PEG + ascorbate.Endoscopy international open · 2021Article
- Comparative Effectiveness of Commercial Bowel Preparations in Ambulatory Patients Presenting for Screening or Surveillance Colonoscopy.Digestive diseases and sciences · 2021Article
- Comparison of Oral Sulfate Solution and Polyethylene Glycol Plus Ascorbic Acid on the Efficacy of Bowel Preparation.Clinical endoscopy · 2020Article
- Training in Endoscopy: Colonoscopy.Clinical endoscopy · 2017Review
- Optimal intake of clear liquids during preparation for afternoon colonoscopy with low-volume polyethylene glycol plus ascorbic acid.Endoscopy international open · 2017Article
- Endoscopist fatigue estimates and colonoscopic adenoma detection in a large community-based setting.Gastrointestinal endoscopy · 2017Article
- Systematic Review: Outcomes by Duration of NPO Status prior to Colonoscopy.Gastroenterology research and practice · 2017Review
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aimsWe aimed to compare the quality of bowel preparation and cecal intubation rates between morning and afternoon colonoscopies and to evaluate the difference in quality of bowel preparation according to the intervals between starting and ending intake of bowel preparation agent and the initiation of colonoscopy.
methodsIn this prospective study, 300 outpatients were instructed to drink PEG solution starting either at 5:00 a.m. (morning group) or at 8:00 a.m. (afternoon group) on the same day. The time when PEG intake was started and completed, and when colonoscopy was begun were recorded. The quality of bowel preparation was assessed using the Ottawa bowel preparation scale.
resultsThere was no significant difference in the Ottawa scale between the morning and the afternoon groups (p = 0.14). Patients with intervals of 7 h or less between the initiation of PEG intake and the start of colonoscopy had a better quality of bowel preparation than those with intervals of more than 7 h (p = 0.03). In addition, patients with intervals of 4 h or less between the end of PEG intake and the start of colonoscopy had a better quality of bowel preparation than those with intervals of more than 4 h (p = 0.02).
conclusionsThe time of day at which colonoscopy is performed, whether during the morning or the afternoon, does not have a significant impact on the quality of bowel preparation. The quality of bowel preparation is significantly better in patients with a shorter time between bowel preparation and the start of colonoscopy.
Indexed as
Identifiers
21042853What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.