Evidence map›Paper›PMID 40704430›Full record

Trial reportJournal of gastroenterology and hepatology2025

Comparative Efficacy and Safety of 0.8-L Versus 2-L Polyethylene Glycol-Ascorbic Acid Solutions in Colonoscopy Preparation: A Prospective, Multicenter, Randomized, Controlled Trial.

Bomee Lee, Bora Keum, Sung Noh Hong, Hyun Gun Kim, Jong Pil Im, Soo-Young Na, Min Seob Kwak, Kwangwoo Nam, Jeong-Sik Byeon

Abstract readMulticenter StudyRandomized Controlled TrialComparative Study
In one paragraph

Trial report in Journal of gastroenterology and hepatology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Trial
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Bomee LeeDepartment of Internal Medicine, Division of Gastroenterology and Hepatology, Korea University College of Medicine, Seoul, South Korea.ORCID https://orcid.org/0009-0003-6519-4168
Bora KeumDepartment of Internal Medicine, Division of Gastroenterology and Hepatology, Korea University College of Medicine, Seoul, South Korea.ORCID https://orcid.org/0000-0003-0391-1945
Sung Noh HongDepartment of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.ORCID https://orcid.org/0000-0002-4140-3717
Hyun Gun KimDepartment of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, South Korea.ORCID https://orcid.org/0000-0001-7545-4638
Jong Pil ImDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, South Korea.
Soo-Young NaDepartment of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.
Min Seob KwakDepartment of Internal Medicine, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, South Korea.
Kwangwoo NamDepartment of Gastroenterology, Dankook University Hospital, Dankook University College of Medicine, Cheonan, South Korea.
Jeong-Sik ByeonDepartment of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.ORCID https://orcid.org/0000-0002-9793-6379

Funding

Taejoon Pharm Co. Ltd., Korea
6 · The paper itself

Abstract

BACKGROUND AND

aimHigh-volume polyethylene glycol (PEG) solutions are associated with low patient compliance, whereas low-volume alternatives pose higher risks of adverse events. We compared a new 0.8-L PEG-ascorbic acid solution containing simethicone to a 2-L PEG-ascorbic acid solution.

methodsIn this prospective, investigator-blinded study, 137 outpatients from five centers were randomized into three groups: Group A (0.8-L PEG-ascorbic acid with a split-dose regimen), Group B (0.8-L PEG-ascorbic acid on the same day as the colonoscopy), and Group C (2-L PEG-ascorbic acid with a split-dose regimen). The primary outcome was the cleansing efficacy, assessed using the Harefield Cleansing Scale (HCS). Secondary outcomes included bubble score, polyp and adenoma detection rates, patient satisfaction, tolerability, and safety.

resultsAll groups achieved 100% successful preparation (HCS grades A and B). Group B had a higher HCS grade in the ascending colon than Group C (3.2 vs. 3.0, p = 0.01). Groups A and B showed better bubble scores than Group C (p < 0.0001). Polyp and adenoma detection rates were similar across the groups. Group B demonstrated the highest satisfaction score (139.1 ± 76.7), followed by Group A (129.8 ± 64.9) and Group C (125.6 ± 60.0), with no significant differences. The tolerability and safety parameters were similar between the groups.

conclusionsThe novel 0.8-L PEG-ascorbic acid solution was effective, safe, and highly tolerable, showing noninferiority to the 2-L PEG-ascorbic acid solution. The same-day regimen showed a tendency toward better cleansing efficacy in the ascending colon and higher patient satisfaction.

Indexed as

Ascorbic AcidCatharticsColonoscopyPolyethylene GlycolsSimethiconeAdultAgedFemaleHumansMaleMiddle AgedPatient SatisfactionPharmaceutical SolutionsProspective StudiesSolutionsTreatment OutcomeAscorbic AcidCatharticsPharmaceutical SolutionsPolyethylene GlycolsSimethiconeSolutionsascorbic acidbowel preparationcolonoscopypatient satisfactionpolyethylene glycols

Identifiers

PMID40704430
PMCPMC12400251

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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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.