- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00616200
Effects of a Very Low Carbohydrate Diet on Symptoms of Irritable Bowel Syndrome (IBS)
The Effect of a Very Low Carbohydrate Diet on Symptoms of Irritable Bowel Syndrome: A Prospective Pilot Study
Study Overview
Status
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
North Carolina
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Chapel Hill, North Carolina, United States, 27599
- UNC Center for Functional GI & Motility Disorders
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Age 18-70 years old, male or female
- Meet Rome II Criteria for IBS-D
- Body mass index > 25 kg/m^2
- Desire to use a very low carbohydrate diet for weight loss
- Score of > 36 on the FBDSI
- Ability to understand consent form
- In stable health by screening history, physical examination performed by a study physician, laboratory tests (normal blood counts, kidney function tests, liver tests, TSH).
Exclusion Criteria:
- Age < 18 years or age > 70 years
- History of inflammatory bowel disease
- History of any gastrointestinal surgery that preceded the onset of IBS symptoms
- Pregnancy or breastfeeding
- FBDSI symptom score of ≤ 36
- Inability to understand consent form
- Diabetes requiring medications (must be controlled with diet and exercise alone).
- Chronic narcotic use for any reason
- Use of serotonin-selective reuptake inhibitors unless patient has been on a stable dose for at least 4 weeks.
- Use of any over-the-counter or prescription weight loss medications.
- Any chronic or unstable diseases (e.g., kidney disease, heart disease, or cancer) that may put the subject at increased risk from the intervention
Any of the following baseline abnormalities of laboratory tests or physical exam findings:
- Serum creatinine > 1.5 mg/dL in men, > 1.3 mg/dL in women.
- Liver disease (AST or ALT > 2 times the upper limit of normal or total bilirubin > 1.6mg/dL).
- Blood pressure > 160/100 mm Hg.
- Fasting triglycerides > 600 mg/dL.
- Fasting serum low-density lipoprotein (LDL) cholesterol > 190 mg/dL.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: A
|
4 weeks on strictly controlled low carbohydrate diet
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Subjects Reporting "Adequate Relief" From IBS Symptoms for the Previous Week. Adequate Relief Was a "True/False" Item.
Time Frame: At the end of each of 6 study weeks
|
Adequate relief was measured as the primary endpoint via a single item Adequate Relief Question asking "Over the past week have you had adequate relief of your symptom experience". Higher scores represent greater levels of adequate relief over the week prior to the assessment. Participants completed this 1-item questionnaire at the end of each of weeks of the study, assessing whether they had adequate relief of their IBS symptoms for the week. A responder was defined as reporting adequate relief in at least 2 of the 4 weeks on the VLCD. |
At the end of each of 6 study weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Impact of Very Low Carbohydrate Diet on Stool Frequency
Time Frame: 6 Weeks
|
Stool Frequency was measured as number of stools per day
|
6 Weeks
|
Sickness Impact Profile
Time Frame: At the end of four week VLCD
|
Units of measurement on the Sickness Impact Profile were ordinal rated scored.
Information on scoring use and interpretation of the Sickness Impact Profile, readers are encouraged to read Bergner et.
al. 1981 - Bergner, M., Bobbit, R.A., Carter, W.B. et all (1981) the Sickness Impact Profile: Development and final revision of a health status measure.
Medical Care, 19:787-805 The SIP measures sickness-related dysfunction based on behavior in order to provide a measure of health status that will aid in assessing the outcome of health care services.
|
At the end of four week VLCD
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Collaborators and Investigators
Investigators
- Principal Investigator: Douglas Drossman, MD, UNC Chapel Hill
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 05-2899
- GCRC 2392
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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