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NCT Number: NCT07361575

Study Comparing the Quality of Colon Cleanliness With Prepackaged LRD (Low-residue Diet) vs. Guided (POG).

Low-residue diet (LRD) in patient improves the quality of the colon cleanliness and thus the adenoma detection rate (ADR). This is a key criterion in colonoscopy screening for colorectal cancer (CRC). The benefit of an LRD lasting more than 24 hours before colonoscopy has not been demonstrated compared to a 24-hour LRD.

Few studies have evaluated the benefit of a prepackaged 24-hour LRD compared to simply receiving oral and written LRD instructions during a consultation.

The aim of the study is to evaluate the usefulness of a prepackaged LRD (Colobox®) compared to simple LRD instructions on colon cleanliness (Boston score) in patients examined by endoscopy.

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Key information

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patient of one of the investigators for total colonoscopy (no prior colonic surgery);
  • Patient aged 18 years or older;
  • Patient classified as ASA 1, ASA 2, or ASA 3;
  • Not participating in any other current clinical trial;
  • Free, informed, and signed consent;
  • Patient affiliated with or a beneficiary of a social security scheme, according to Article L.1124-1 of the French Public Health Code;

Exclusion criteria

  • Patient taking major psychotropic medications;
  • Patient with uncontrolled diabetes;
  • Patient with coagulation abnormalities preventing polypectomy: PT <50%, Platelets <50,000/mm³, current effective anticoagulation therapy (clopidogrel, prasugrel, or ticagrelor);
  • Patient referred for removal of a known polyp;
  • Chronic inflammatory bowel disease;
  • Known colonic stenosis;
  • Diverticulitis of less than 6 weeks duration;
  • Pregnant, parturient, or breastfeeding woman;
  • Patient deprived of liberty by administrative or judicial order, or under guardianship or limited legal protection;
  • Patient unable to understand the objectives and constraints of the study.

Treatment and study plan

colonoscopy

Procedure

Colonoscopy performed and Boston score evaluated

questionnaires

Other

LRD satisfaction questionnaire LRD compliance questionnaire

Pre-colonoscopy diet according to the investigator's oral instructions

Other

24 hours before the colonoscopy, The patients follow a special diet, either by themselves according to the investigator's oral instructions

Pre-colonoscopy diet by following a special preparation, Colobox.

Other

24 hours before the colonoscopy, The patients follow a special diet, by following a special preparation, Colobox.

Primary outcomes

  1. Boston Score

    Time frame: 1 day

    A 9-point system, helps them see how clean a patient's large intestine is during a colonoscopy. This scale divides the large intestine into three parts: right, middle, and left.

    Each part can score from :

    BBPS = 0 (per segment) : unprepared colon segment with mucosa not seen because of solid stool that cannot be cleared.

    BPPS=3 (per segment) : entire mucosa of the colon segment seen well, with no residual staining, small fragments of stool, or opaque liquid.

Study contacts

Contact information is provided by the study sponsor or research team.

Coralie DE CLERCK

CONTACT

[email protected]

0033143967823

Sponsors and collaborators

Lead sponsor

Clinique Paris-Bercy

Other

Registry information

Official study title

A Single-blind, Randomized Study Comparing the Quality of Colon Cleanliness With Prepackaged LRD (Low-residue Diet) vs. Guided (POG).

Acronym: POG

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Jan 23, 2026
Registry last updated
Feb 17, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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