Bowel Preparation QualitySEASON-BCQNCT07367373
Impact of the Four Seasons on Bowel Cleansing Quality Prior to Colonoscopy
An observational study of Bowel Preparation Quality and Colonoscopy, run by Bakirkoy Dr. Sadi Konuk Research and Training Hospital at 1 site in Turkey (Türkiye).
Trial 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. Read more about this study
- Who is it for?
- Ages 18 to 90 years
- Conditions the study is for
- Bowel Preparation Quality, Colonoscopy
- What is being tested?
- Routine Colonoscopy Bowel Preparation Quality Assessment
- How many people
- 1,000 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Jan 2025to 1 Jan 2026
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 90 years
- All sexes
- No healthy volunteers
- Adult, Older adult
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.
Who may be able to join
- Patients aged between 18 and 90 years
- Patients scheduled for elective colonoscopy
Who cannot join
- 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
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Bakırköy Dr. Sadi Konuk Training and Research Hospital
Istanbul, Istanbul, 34147
About this study
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.
Read the 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.
- Conditions
- Bowel Preparation Quality, Colonoscopy
- Being tested
- Routine Colonoscopy Bowel Preparation Quality Assessment
- Keywords
- colonoscopy, bowel preparation, seasonal variation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Routine Colonoscopy Bowel Preparation Quality AssessmentOther
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.
| Study group | Role | What they receive |
|---|---|---|
| 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. Receives: 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. Receives: 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. Receives: 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. Receives: Other: Routine Colonoscopy Bowel Preparation Quality Assessment |
What is being measured
The primary outcome is the main question the study is designed to answer.
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.
Measured: During the colonoscopy procedure
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 Jan 2026
- Study start1 Jan 2025
- Primary completion1 Jan 2026
- Study completion1 Jan 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Bowel Preparation QualityStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 1,000 participants (actual)
Sponsor and investigators
- Lead sponsor
- Bakirkoy Dr. Sadi Konuk Research and Training Hospital
- Sponsor type
- Other government
- Responsible party
- Principal investigator, Nurettin Şahin, Bakirkoy Dr. Sadi Konuk Research and Training Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07367373
- Sponsor's protocol ID
- BSK_BowelPrep_Seasonal
- Acronym
- SEASON-BCQ
- Status last verified
- Jan 2026
- First submitted
- 18 Jan 2026
- Last updated
- 27 Jan 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: 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.
Publications
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.
PubMed 37312029
Study at a glance
From the registry record, last updated by the sponsor on 27 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Impact of the Four Seasons on Bowel Cleansing Quality Prior to Colonoscopy
- ClinicalTrials.gov ID
- NCT07367373
- Acronym / sponsor ID
- SEASON-BCQ / BSK_BowelPrep_Seasonal
- Conditions
- Bowel Preparation Quality, Colonoscopy
- Keywords
- colonoscopy, bowel preparation, seasonal variation
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 1,000 participants (actual)
- Lead sponsor
- Bakirkoy Dr. Sadi Konuk Research and Training HospitalOther government
- Study start
- 1 Jan 2025 (actual)
- Primary completion
- 1 Jan 2026 (actual)
- Study completion
- 1 Jan 2026 (actual)
- First posted
- 26 Jan 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
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 design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Spring Group | – | Other: Routine Colonoscopy Bowel Preparation Quality AssessmentPatients 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. |
| Summer Group | – | Other: Routine Colonoscopy Bowel Preparation Quality AssessmentPatients 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. |
| Autumn Group | – | Other: Routine Colonoscopy Bowel Preparation Quality AssessmentPatients 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. |
| Winter Group | – | Other: Routine Colonoscopy Bowel Preparation Quality AssessmentPatients 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. |
Who may qualify
- Ages
- 18 to 90 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- 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.
Key inclusion criteria (2 listed)
- Patients aged between 18 and 90 years
- Patients scheduled for elective colonoscopy
Key exclusion criteria (5 listed)
- 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
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Routine Colonoscopy Bowel Preparation Quality AssessmentThis 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. | Other | Autumn Group, Spring Group, Summer Group, Winter Group |
Primary outcome
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.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 Jan 2026.
- Results publication: PubMed 37312029Shi 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.
- Individual participant dataSharing planned: No. 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.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Bowel Preparation Quality and Colonoscopy, run by Bakirkoy Dr. Sadi Konuk Research and Training Hospital at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 27 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Bowel Preparation Quality During Elective Colonoscopy (time frame: During the colonoscopy procedure). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07367373, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Jan 2026.