Impact of the Four Seasons on Bowel Cleansing Quality Prior to Colonoscopy

NCT07367373 | Completed

• 1 other identifier: BSK_BowelPrep_Seasonal
• Study Type: observational
• Target: 1,000
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Bowel Preparation Quality; Colonoscopy

Keywords

colonoscopy; bowel preparation; seasonal variation

Outcome Measures

Primary Outcomes (1)

• Bowel Preparation Quality During Elective Colonoscopy

  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

Study Arms (4)

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

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

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

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

Interventions

Routine Colonoscopy Bowel Preparation Quality Assessment OTHER

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; Spring Group; Summer Group; Winter Group

Eligibility Criteria

• Age: 18 Years - 90 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• 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.

You may qualify if:

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

You may not qualify if:

• 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

Sponsors & Collaborators

• Bakirkoy Dr. Sadi Konuk Research and Training Hospital: lead

Study Sites (1)

Bakırköy Dr. Sadi Konuk Training and Research Hospital

Istanbul, Istanbul, 34147, Turkey (Türkiye)

Location

Related Publications (1)

• Shi L, Liao F, Liao W, Zhu Y, Chen Y, Shu X. Risk factors for inadequate bowel preparation before colonoscopy: a retrospective cohort study. BMC Gastroenterol. 2023 Jun 13;23(1):204. doi: 10.1186/s12876-023-02796-2.

  PMID: 37312029 RESULT

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER GOV
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Consultant General Surgeon

Study Record Dates

• First Submitted: January 18, 2026
• First Posted: January 26, 2026
• Study Start: January 1, 2025
• Primary Completion: January 1, 2026
• Study Completion: January 1, 2026
• Last Updated: January 27, 2026

Record last verified: 2026-01

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)