The Effect of Video-Based Education on Colonoscopy Preparation

November 13, 2025 updated by: Şafak Meric Ozgenel, Eskisehir Osmangazi University

Evaluation of the Effect of Video-Based Education on Bowel Preparation Before Colonoscopy

Colonoscopy is a routine procedure for evaluating gastrointestinal symptoms, detecting colorectal cancer, and removing polyps. Its effectiveness depends on patient compliance with bowel preparation instructions. However, inadequate bowel preparation occurs in 20-25% of colonoscopies, often due to non-adherence, medical conditions, or long waiting times. Poor preparation can reduce examination quality, prevent detection of precancerous lesions, and increase healthcare costs. Video-based education has been shown to be more effective than written or verbal instructions in improving bowel preparation. This study aims to evaluate the effect of video-based education on colonoscopy bowel preparation and contribute evidence to optimize patient compliance.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Colonoscopy is a standard procedure performed for the evaluation of gastrointestinal symptoms, colorectal cancer screening, polyp detection, and polyp removal. Colorectal cancer (CRC) is the second leading cause of cancer-related deaths in the United States , and in Türkiye, 21,718 new cases were reported in 2022. These statistics underscore the importance of colonoscopy as a preventive and diagnostic tool.

When conducted properly, colonoscopy is safe and well-tolerated, allowing visualization of the entire colon and distal terminal ileum. The procedure's optimal effectiveness relies heavily on patient compliance with bowel preparation instructions. Unfortunately, inadequate bowel preparation occurs in approximately 20-25% of colonoscopies, often due to non-adherence, medical conditions affecting bowel cleansing, or prolonged waiting times for the procedure.

While interventions addressing medical conditions or waiting times may not always be feasible, non-compliance with preparation instructions represents a modifiable, patient-related factor. Effective bowel preparation requires adherence to dietary recommendations and the use of prescribed laxatives. The quality of preparation impacts examination adequacy, procedure duration, cancellation rates, and the need for repeat colonoscopies. Inadequate preparation can hinder thorough evaluation, prevent detection of precancerous lesions such as polyps, and increase healthcare costs.

Emerging evidence suggests that video-based educational interventions are more effective than traditional written or verbal instructions, phone calls, social media applications, or messaging services in improving patient compliance and bowel preparation quality.

This study aims to assess the effect of video-based education on bowel preparation before colonoscopy. By evaluating its impact on preparation quality and patient adherence, the study seeks to provide evidence for implementing more effective educational strategies in colonoscopy units, thereby optimizing clinical outcomes and resource utilization.

Study Type

Interventional

Enrollment (Estimated)

246

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

  • Name: Safak Meric Ozgenel, Assistant professor
  • Phone Number: 2956 +902222392979
  • Email: mozgenel@ogu.edu.tr

Study Contact Backup

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Voluntary participation in the study.
  • Outpatient follow-up.
  • No prior history of colonoscopy.
  • Participant or a household member (spouse, child, parent, sibling) owns and can use a smartphone application.

Exclusion Criteria:

  • History of major abdominal surgery.
  • Suspected obstructive lesion in the gastrointestinal tract on cross-sectional imaging.
  • Impaired swallowing reflex.
  • Mental disorder.
  • Communication difficulties (speech, perception, comprehension problems).
  • Congestive heart failure or kidney failure.
  • Pregnancy or breastfeeding.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Health Services Research
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Video-based education group for Sodium Picosulfate (0.1 g) sennoside b (3 mg) + Bisacodyl (5 mg)
Participants receive a video-based education program explaining colonoscopy preparation steps, diet instructions, and use of laxatives.
Behavioral: Video Education
Participants receive routine written and verbal instructions about colonoscopy preparation, including dietary instructions and use of prescribed laxatives. This represents the standard care provided at the study site.
No Intervention: Control group for Sodium Picosulfate (0.1 g) sennoside B (3 mg) + Bisacodyl (5 mg)
Participants receive routine written and verbal instructions for colonoscopy preparation.
Experimental: Video-based education group for Sodium Picosulfate (0.1 g)
Participants receive a video-based education program explaining colonoscopy preparation steps, diet instructions, and use of laxatives.
Behavioral: Video Education
Participants receive routine written and verbal instructions about colonoscopy preparation, including dietary instructions and use of prescribed laxatives. This represents the standard care provided at the study site.
No Intervention: Control group for Sodium Picosulfate (0.1 g)
Participants receive routine written and verbal instructions for colonoscopy preparation.
Experimental: Video-based education group for Sennoside A+B (1875 mg)
Participants receive a video-based education program explaining colonoscopy preparation steps, diet instructions, and use of laxatives.
Behavioral: Video Education
Participants receive routine written and verbal instructions about colonoscopy preparation, including dietary instructions and use of prescribed laxatives. This represents the standard care provided at the study site.
No Intervention: Control group for Sennoside A+B (1875 mg)
Participants receive routine written and verbal instructions for colonoscopy preparation.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Quality of Bowel Preparation
Time Frame: Day of Colonoscopy
The quality of bowel preparation will be assessed on the day of colonoscopy using the Boston Bowel Preparation Scale (BBPS). This scale evaluates cleansing in three segments of the colon. Higher scores indicate better preparation, reflecting patient compliance with dietary and laxative instructions and the effectiveness of the educational intervention.
Day of Colonoscopy

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Eskisehir Osmangazi University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 1, 2024

Primary Completion (Estimated)

December 30, 2025

Study Completion (Estimated)

March 30, 2026

Study Registration Dates

First Submitted

November 13, 2025

First Submitted That Met QC Criteria

November 13, 2025

First Posted (Estimated)

November 14, 2025

Study Record Updates

Last Update Posted (Estimated)

November 14, 2025

Last Update Submitted That Met QC Criteria

November 13, 2025

Last Verified

November 1, 2025

More Information

Terms related to this study

Other Study ID Numbers

  • ESOGU-OZGENEL-2025-COLONOSCOPY

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

All requested data can be shared.

IPD Sharing Time Frame

End date of the study and one year after that

IPD Sharing Access Criteria

The paper reviewers will be able to access the IPD and supporting information.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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