Impact of the Four Seasons on Bowel Cleansing Quality Prior to Colonoscopy (SEASON-BCQ)

January 25, 2026 updated by: Nurettin Şahin, Bakirkoy Dr. Sadi Konuk Research and Training Hospital

Patients scheduled to undergo elective colonoscopy will be evaluated in this observational study. No additional medications, interventions, or diagnostic procedures beyond standard clinical practice will be administered. The primary objective of the study is to investigate whether the quality of bowel preparation prior to colonoscopy varies according to seasonal differences.

Bowel cleansing quality will be assessed during the colonoscopy procedure using standard evaluation criteria. The quality of bowel preparation will be compared across different seasons to determine the potential impact of seasonal variation on bowel cleansing adequacy prior to elective colonoscopy.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This study is designed as an observational analysis of patients undergoing elective colonoscopy. All participants will receive standard bowel preparation according to routine clinical practice, and no additional medications, interventions, or diagnostic tests will be introduced as part of the study protocol.

The primary aim of the study is to evaluate whether seasonal variation influences the quality of bowel preparation prior to colonoscopy. Adequate bowel cleansing is a critical factor affecting diagnostic accuracy, procedural efficiency, and patient outcomes during colonoscopy. Environmental factors, including seasonal changes, may influence patient compliance, hydration status, and dietary habits, which could potentially affect bowel preparation quality.

Bowel cleansing quality will be assessed during the colonoscopy procedure using established bowel preparation assessment criteria. Patients will be categorized according to the season in which the colonoscopy is performed, and bowel preparation quality will be compared among these seasonal groups.

The findings of this study are expected to provide insight into the potential impact of seasonal variation on bowel preparation quality and may contribute to optimizing colonoscopy preparation strategies in clinical practice.

Study Type

Observational

Enrollment (Actual)

1000

Contacts and Locations

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

Study Locations

  • Turkey (Türkiye)
    • Istanbul
      • Istanbul, Istanbul, Turkey (Türkiye), 34147
        • Bakırköy Dr. Sadi Konuk Training and Research Hospital

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

Sampling Method

Non-Probability Sample

Study Population

The study population consists of adult patients aged between 18 and 90 years who are scheduled to undergo elective colonoscopy. Patients will be evaluated during routine clinical practice without any additional interventions, medications, or diagnostic procedures. Bowel preparation quality will be assessed at the time of colonoscopy, and patients will be categorized according to the season in which the procedure is performed (spring, summer, autumn, and winter). Patients undergoing emergency colonoscopy, those with colonic obstruction, chronic kidney disease, or a history of abdominal surgery involving the stomach, duodenum, small intestine, or colon will be excluded.

Description

Inclusion Criteria:

  • Patients aged between 18 and 90 years
  • Patients scheduled for elective colonoscopy

Exclusion Criteria:

  • Patients younger than 18 years or older than 90 years
  • Patients scheduled for emergency colonoscopy
  • Patients with colonic obstruction
  • Patients with chronic kidney disease
  • Patients with a history of abdominal surgery involving the stomach, duodenum, small intestine, or colon

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Spring Group
Patients undergoing elective colonoscopy during the spring season. Bowel preparation quality will be assessed during routine colonoscopy without any additional intervention, medication, or diagnostic procedure beyond standard clinical practice.
Other: Routine Colonoscopy Bowel Preparation Quality Assessment
This is an observational and non-interventional study. No additional medications, diagnostic tests, or procedures are administered to the patients beyond routine clinical practice. The intervention consists solely of assessing bowel preparation quality during routinely performed elective colonoscopy procedures and evaluating its association with seasonal variation.
Summer Group
Patients undergoing elective colonoscopy during the summer season. Bowel preparation quality will be assessed during routine colonoscopy without any additional intervention, medication, or diagnostic procedure beyond standard clinical practice.
Other: Routine Colonoscopy Bowel Preparation Quality Assessment
This is an observational and non-interventional study. No additional medications, diagnostic tests, or procedures are administered to the patients beyond routine clinical practice. The intervention consists solely of assessing bowel preparation quality during routinely performed elective colonoscopy procedures and evaluating its association with seasonal variation.
Autumn Group
Patients undergoing elective colonoscopy during the autumn season. Bowel preparation quality will be assessed during routine colonoscopy without any additional intervention, medication, or diagnostic procedure beyond standard clinical practice.
Other: Routine Colonoscopy Bowel Preparation Quality Assessment
This is an observational and non-interventional study. No additional medications, diagnostic tests, or procedures are administered to the patients beyond routine clinical practice. The intervention consists solely of assessing bowel preparation quality during routinely performed elective colonoscopy procedures and evaluating its association with seasonal variation.
Winter Group
Patients undergoing elective colonoscopy during the winter season. Bowel preparation quality will be assessed during routine colonoscopy without any additional intervention, medication, or diagnostic procedure beyond standard clinical practice.
Other: Routine Colonoscopy Bowel Preparation Quality Assessment
This is an observational and non-interventional study. No additional medications, diagnostic tests, or procedures are administered to the patients beyond routine clinical practice. The intervention consists solely of assessing bowel preparation quality during routinely performed elective colonoscopy procedures and evaluating its association with seasonal variation.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Bowel Preparation Quality During Elective Colonoscopy
Time Frame: During the colonoscopy procedure
Bowel preparation quality assessed during elective colonoscopy using the Boston Bowel Preparation Scale (BBPS), which ranges from 0 to 9, with higher scores indicating better bowel cleansing quality. Bowel preparation quality scores will be compared across different seasons.
During the colonoscopy procedure

Collaborators and Investigators

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

Sponsor

Bakirkoy Dr. Sadi Konuk Research and Training Hospital

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)

January 1, 2025

Primary Completion (Actual)

January 1, 2026

Study Completion (Actual)

January 1, 2026

Study Registration Dates

First Submitted

January 18, 2026

First Submitted That Met QC Criteria

January 18, 2026

First Posted (Actual)

January 26, 2026

Study Record Updates

Last Update Posted (Actual)

January 27, 2026

Last Update Submitted That Met QC Criteria

January 25, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • BSK_BowelPrep_Seasonal

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual participant data (IPD) will not be shared, as this is a single-center observational study and the data include potentially identifiable clinical information. Data will be used solely for the purposes of this study in accordance with institutional policies, ethical approval, and applicable regulations.

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.

Clinical Trials on Colonoscopy

Clinical Trials on Routine Colonoscopy Bowel Preparation Quality Assessment

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in France

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe