Effect of Gum Chewing or Walking on Bowel Prep Quality and Patient Satisfaction Before Colonoscopy

NCT ID: NCT06192394

Last Updated: 2026-01-15

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 168 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2024-07-05
• Study Completion Date: 2025-07-20

Brief Summary

Colorectal cancers are a major global health problem, highlighting the critical importance of screening programs for early diagnosis and effective treatment. The success of colonoscopy largely depends on the quality of bowel preparation. Inadequate bowel preparation may reduce the effectiveness of colonoscopy and cause lesions to be missed.

Previous research has shown the positive effects of diet, training, and polyethylene glycol use on bowel readiness. However, there is limited research on the effects of methods such as gum chewing and walking exercise.

This study aims to evaluate the effects of gum chewing and walking exercise, as well as diet and medication, on the quality of bowel preparation and patient satisfaction during the bowel preparation process before colonoscopy. The study uses a randomized controlled, single-blind experimental design with three different groups: a control group, a gum chewing group, and a walking exercise group. Each group will be evaluated based on bowel preparation quality and patient satisfaction. The quality of bowel preparation will be determined using the Boston Bowel Preparation Scale, and factors such as polyp detection, workability of colonoscopy, and cecal intubation time will also be evaluated. Patient satisfaction levels will be evaluated by taking into account how satisfied the patients are with the colonoscopy procedure and their complaints before and after the procedure.

The results of this study will contribute to a better understanding of the impact of chewing gum and walking exercise before colonoscopy on the quality of bowel preparation and patient satisfaction. Identifying effective methods to improve the quality of bowel preparation can contribute to a healthier society by raising the standard of nursing care. At the same time, this research may improve the comfort and effectiveness of the colonoscopy process for patients and benefit public health by increasing the effectiveness of colorectal cancer screening programs.

Detailed Description

An ideal bowel preparation should have the capacity to evacuate the fecal load quickly, without compromising the comfort of patients or causing fluid-electrolyte imbalance. Various methods are used to improve the quality of bowel preparation, such as pre-colonoscopy education, low-fiber diet, and use of split-dose polyethylene glycol (PEG). There are many scientific studies showing that these methods increase the quality of bowel preparation. However, there have been fewer studies showing that methods such as chewing gum and walking exercises before colonoscopy increase the quality of bowel preparation. No study has been found in which these two methods were evaluated together. In order to eliminate the deficiency in this field, it is thought that this study will be useful in improving the quality of bowel preparation before colonoscopy.

Chewing gum is a virtual feeding method that stimulates the cephalic-vagal reflex, promoting the secretion of gastric and intestinal hormones and increasing intestinal motility. Chewing gum has advantages such as ease of application, low cost, and no reported side effects. Therefore, the use of this method as a safe intervention is recommended. Its effectiveness in reducing postoperative ileus and hospital stay has been demonstrated in many studies.

It is stated that walking exercise improves bowel cleanliness and reduces discomfort associated with nausea and abdominal pain during bowel preparation for colonoscopy. A systematic review found that low and moderate-intensity exercise lasting less than 60 minutes supports gastrointestinal motility.

Inadequate bowel preparation can lead to the repetition of the colonoscopy procedure, negatively affecting patients' experiences and satisfaction. In addition to this, factors such as the difficulty of the bowel preparation process in patients undergoing colonoscopy, unsedated colonoscopy, long appointment dates, and insufficient pre-procedure information can also negatively impact patient satisfaction. Assessing the satisfaction of patients is recommended for a successful and high-quality colonoscopy procedure.

This study was designed as a randomized controlled experimental study to determine the effects of gum chewing and walking exercise, as well as the use of diet and medication during the bowel preparation process before colonoscopy, on the quality of bowel preparation and patient satisfaction.

Conditions

Colonoscopy; Bowel Preparation

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: DIAGNOSTIC
• Blinding Strategy: SINGLE

Study Groups

Control Group

Patients in the control group will undergo the standard bowel preparation determined by the hospital, which includes the following steps:

• No solid food should be consumed after the evening meal 2 days before colonoscopy.
• Only clear liquids should be consumed the day before colonoscopy.
• If the colonoscopy is scheduled for 12:00 PM, nothing should be eaten or drank after midnight on the preceding night; if the colonoscopy is scheduled for the afternoon, nothing should be consumed after 06:00 AM on the same day.
• The entire X-M Diet syrup should be consumed with plenty of water within 1 hour at 4:00 PM and 8:00 PM the day before colonoscopy. Additionally, an enema (BT Enema) should be administered at 11:00 PM the night before and at 07:00 AM on the day of colonoscopy.

Group Type: SHAM_COMPARATOR

Control

Intervention Type: OTHER

Patients will undergo standard bowel preparation determined by the hospital.

Chewing Gum Group

All patients in the gum-chewing group will receive the following interventions in addition to standard bowel preparation:

• Patients will be instructed to chew xylitol gum for 20 minutes at three intervals (17:00-19:00, 19:00-21:00, 21:00-23:00) after consuming the prescribed X-M Diet syrup on the day before the procedure.
• Following the administration of an enema on the procedure day, patients will be instructed to chew gum every 2 hours for 20 minutes until one hour before the scheduled procedure time.

Group Type: ACTIVE_COMPARATOR

Chewing Gum

Intervention Type: OTHER

Patients will be asked to chew xylitol gum for 20 minutes every 2 hours (17.00-19.00, 19.00-21.00, 21.00-23.00) after drinking the X-M Diet syrup prescribed the day before the colonoscopy procedure. After the enema is given on the day of the colonoscopy, they will be asked to chew gum for 20 minutes every 2 hours until one hour before the scheduled procedure time. Xylitol is a naturally occurring five-carbon sugar alcohol (C5H12O5) found in fruits and vegetables such as plums, strawberries, cauliflower, and pumpkin. It is similar in taste to sucrose but contains 40% fewer calories than other carbohydrates (1 gram of xylitol = 2.4 calories). Xylitol has positive effects on dental health and may also have beneficial impacts on other systems such as immunity, respiratory, and digestive systems. Since xylitol is not digested by human enzymes, it has a laxative effect. In the study, sugar-free gum with xylitol will be used.

Walking Exercise Group

All patients in the walking group will receive the following interventions in addition to standard bowel preparation:

• Patients will be asked to drink the prescribed X-M diet syrup 1 day before the procedure and then walk for 1 hour at two specific times (from 18:00 to 19:00 and from 22:00 to 23:00).
• On the day of the procedure, after the enema, patients will be instructed to walk from 08:00 until one hour before the scheduled procedure time.
• Patients will be given a pedometer to count their steps and will be asked to walk at least 3000 steps before the colonoscopy procedure.

Group Type: ACTIVE_COMPARATOR

Walking Exercise

Intervention Type: OTHER

Patients will be given a pedometer to count their steps and will be asked to walk at least 3000 steps before the colonoscopy procedure.

Interventions

Chewing Gum

Patients will be asked to chew xylitol gum for 20 minutes every 2 hours (17.00-19.00, 19.00-21.00, 21.00-23.00) after drinking the X-M Diet syrup prescribed the day before the colonoscopy procedure. After the enema is given on the day of the colonoscopy, they will be asked to chew gum for 20 minutes every 2 hours until one hour before the scheduled procedure time. Xylitol is a naturally occurring five-carbon sugar alcohol (C5H12O5) found in fruits and vegetables such as plums, strawberries, cauliflower, and pumpkin. It is similar in taste to sucrose but contains 40% fewer calories than other carbohydrates (1 gram of xylitol = 2.4 calories). Xylitol has positive effects on dental health and may also have beneficial impacts on other systems such as immunity, respiratory, and digestive systems. Since xylitol is not digested by human enzymes, it has a laxative effect. In the study, sugar-free gum with xylitol will be used.

Intervention Type: OTHER

Walking Exercise

Patients will be given a pedometer to count their steps and will be asked to walk at least 3000 steps before the colonoscopy procedure.

Intervention Type: OTHER

Control

Patients will undergo standard bowel preparation determined by the hospital.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Individuals aged between 18 and 65 years,
• Capable of effective communication,
• Mentally healthy,
• Individuals who can comprehend and implement planned interventions before colonoscopy.

Exclusion Criteria

• Individuals with a history of abdominal surgery,
• Those with serious illnesses that could affect the study outcomes (e.g., severe heart failure, kidney failure),
• Individuals using medications that could impact intestinal functions due to systemic diseases,
• Individuals who have not complied with the recommended interventions will not be included.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Istanbul University - Cerrahpasa

OTHER

Sponsor Role: lead

Responsible Party

ibrahim kiyat

Research Assistant

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

ibrahim kiyat

Role: PRINCIPAL_INVESTIGATOR

PhD student

Locations

Istanbul University-Cerrahpaşa

Istanbul, , Turkey (Türkiye)

Countries

Turkey (Türkiye)

Other Identifiers

IUC-HEM-IK-01

Identifier Type: -

Identifier Source: org_study_id