Irritable Bowel SyndromeCRAIGSNCT03729622
Carbohydrate Reduction and Impact on Gastrointestinal System
A study testing Low FODMAP Diet in people with Irritable Bowel Syndrome, run by University of Nottingham at 1 site in United Kingdom.
Trial summary
Title : A pilot single blind randomised controlled trial of the effect of a diet low in poorly digested carbohydrates on gastrointestinal form and symptoms in irritable bowel syndrome patients Acronym: CRAIGS Short title: Carbohydrate reduction and impact on gastrointestinal system Chief Investigator: Prof Robin… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Irritable Bowel Syndrome
- What is being tested?
- Low FODMAP Diet
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 65 participants
- Where
- 1 siteUnited Kingdom
- Study dates
- Jan 2016to Aug 2017
- Phase
- Interventional
- 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 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Aged 18 and above
- Able to give informed consent
- Previous Diagnosis of IBS by medical practitioner
- Meeting ROME III criteria for IBS
- Investigations showing negative tissue transglutaminase (tTG) IgA antibodies
- Full blood count test does not indicate Anaemia
Show all 12Show fewer
- Aged 18 and above
- Able to give informed consent
- Previous Diagnosis of IBS by medical practitioner
- Meeting ROME III criteria for IBS
- Investigations showing negative tissue transglutaminase (tTG) IgA antibodies
- Full blood count test does not indicate Anaemia
Who cannot join
- Children (<18 years)
- History declared by the candidate of pre-existing gastrointestinal disorder, including but not limited to:
- Inflammatory Bowel Disease
- Coeliac Disease
- Pancreatitis
- Gallstone disease (biliary colic, cholecystitis)
Show all 23Show fewer
- Diverticulitis
- Cancer of the gastrointestinal tract
- Reported history of previous resection of any part of the gastrointestinal tract other than appendix or gallbladder
- Intestinal stoma
- Limited understanding of English
- Pregnancy declared by the candidate
- Red flag symptoms such as rectal bleeding, family history of bowel or ovarian cancer, a change in bowel habit to looser and/or more frequent stools persisting for more than six weeks in a person aged over 60 years.
- Investigations showing positive tissue transglutaminase (tTG) IgA antibodies
- Anaemia confirmed by full blood count test
- Habitual use of opiate analgesics likely to alter bowel function e.g. morphine
- Use of antibiotics in the preceding four weeks other than for treatment of index infection.
- Any condition where the candidate is likely to require a course of antibiotics in the next 3 months e.g. severe chronic respiratory disease, recurrent urinary tract infection, lower limb ulceration
- Inability to complete the symptom questionnaires e.g. cognitive dysfunction limiting memory and understanding
- Anyone who in the opinion of the investigator is unlikely to be able to comply with the protocol e.g. chaotic lifestyle related to substance abuse
- Dietary practice not compatible with safe implementation of the trial diet e.g.veganism
- Medical reasons for pre-existing controlled diet that cannot be safely randomised e.g. end-stage kidney disease, diabetes
- Participants taking prebiotic/probiotic
Trial locations and contacts
1 site in 1 country.
United Kingdom1 site
Nottingham Digestive Diseases Centre
Nottingham, Nottinghamshire, NG7 2UH
About this study
Official title: A Pilot Randomised Controlled Trial of the Effect of a Diet Low in Poorly Digested Carbohydrates on Gastrointestinal Form and Symptoms in Irritable Bowel Syndrome Patients
Title :
A pilot single blind randomised controlled trial of the effect of a diet low in poorly digested carbohydrates on gastrointestinal form and symptoms in irritable bowel syndrome patients
Read more
Acronym: CRAIGS
Short title: Carbohydrate reduction and impact on gastrointestinal system Chief Investigator: Prof Robin Spiller
Objectives:
The purpose of this study is to:
- Investigate the proportion of patients with Irritable Bowel Syndrome who report moderate or substantial improvement in their symptoms after 2 weeks of following a diet low in Fermentable Oligo-Di-Monosaccharides and Polyols (FODMAPs) compared to patients who are on their habitual diet.
- Determine the difference in colonic volume of IBS patients receiving immediate low FODMAP dietary intervention after 2 weeks compared to patients who are not on the diet (delayed dietary intervention).
- Investigate the changes in self-reported food intolerance that occurs before dietary intervention.
Trial Configuration:
2-arm, parallel group, randomised, controlled trial
Setting :
Research clinic within NIHR Biomedical Research Unit, Secondary care
Read the detailed description
TRIAL / STUDY OBJECTIVES AND PURPOSE
The trial aims to investigate the effect of a diet low in FODMAPs on colonic morphology as well as in improving symptoms of irritable bowel syndrome (IBS).
This mechanistic information, along with the clinical data, will allow planning of larger, multi-centre studies of the low FODMAP diet in similar patients.
HYPOTHESES
- Patients on a low FODMAP diet for 2 weeks will have a decreased fasting colonic volume measured by Magnetic Resonance Imaging (MRI) compared to participants who have not started the diet.
- Patients with IBS are more likely to report a clinically important improvement in symptoms following the low FODMAP diet (immediate intervention) compared to those on their habitual diet (delayed intervention).
PRIMARY OBJECTIVE • To compare the proportion of IBS patients reporting a clinically important improvement in symptoms following a low FODMAP diet for 2 weeks against IBS patients who are on their habitual diet.
SECONDARY OBJECTIVES
- Determine the difference in fasting colonic volume of IBS patients receiving low FODMAP dietary intervention after 2 weeks compared to those on habitual diet.
TRIAL DESIGN
This will be a pilot single-blind, randomised, controlled trial (RCT). Since some activity will take place on the University of Nottingham this will be a multi-centre study.
All participants will receive advice from a dietitian on the low FODMAP diet. They will be randomised to one of two parallel treatment arms:
- Low FODMAP dietary advice (immediate intervention)
- Habitual diet (control - delayed intervention )
- Conditions
- Irritable Bowel Syndrome
- Being tested
- Low FODMAP Diet
- Keywords
- FODMAPs, Low FODMAP Diet
- Medical subject headings
- Irritable Bowel Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Low FODMAP DietOther
Both arms will receive the intervention but at different time points.
| Study group | Role | What they receive |
|---|---|---|
| Immediate Intervention | Active comparator | Participants in this arm will receive an immediate low FODMAP dietary intervention on their second visit after they have been screened, consented and enrolled during visit 1. Receives: Other: Low FODMAP Diet |
| Delayed Intervention | Placebo comparator | Participants in this arm will receive a delayed Low FODMAP dietary intervention during their third visit after they have been been screened, consented and enrolled during visit 1. Receives: Other: Low FODMAP Diet |
What is being measured
The primary outcome is the main question the study is designed to answer.
Adequate symptom relief between cases and controls
Adequate symptom relief assessed by questionnaire after intervention in cases and before intervention in cases
Measured: Assessed in cases on their last day of the intervention (2 weeks after dietary change). Assessed in controls before they began their intervention (between 1-2 weeks before dietary changes)
Secondary outcomes (2)
Changes in colonic volume between cases and controls from baseline
A change in colonic volume measured in milliliters (ml) from baseline and after intervention in cases. This will compared with a change in colonic volume from baseline and before intervention in controls.
Measured: Measured : i) baseline (day 0), ii) last day of intervention (cases) (2 weeks after dietary change), iii) before intervention (2 weeks before dietary advice)
Changes in fermentation between cases and controls
A change in breath hydrogen concentration measured in parts per million (ppm) from: baseline and after intervention (cases) ii) from baseline and before intervention (controls)
Measured: Measured : i) baseline (day 0), ii) last day of intervention (cases) (2 weeks after dietary change), iii) before intervention (2 weeks before dietary advice)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Nov 2018
- Study startJan 2016
- Primary completionJul 2017
- Study completionAug 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Irritable Bowel SyndromeStudies 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 65 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Nottingham
- Sponsor type
- University, hospital or other
- Collaborators
- King's College London
- Responsible party
- Sponsor
- Investigators
- Robin Spiller, MD,FRCP, Principal investigator, University of Nottingham
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03729622
- Sponsor's protocol ID
- 15081
- Acronym
- CRAIGS
- Status last verified
- Nov 2018
- First submitted
- 18 Aug 2017
- Last updated
- 2 Nov 2018
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 2 Nov 2018. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Pilot Randomised Controlled Trial of the Effect of a Diet Low in Poorly Digested Carbohydrates on Gastrointestinal Form and Symptoms in Irritable Bowel Syndrome Patients
- ClinicalTrials.gov ID
- NCT03729622
- Acronym / sponsor ID
- CRAIGS / 15081
- Conditions
- Irritable Bowel Syndrome
- Keywords
- FODMAPs, Low FODMAP Diet
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 65 participants (actual)
- Lead sponsor
- University of NottinghamUniversity, hospital or other
- Collaborators
- King's College London
- Study start
- Jan 2016 (actual)
- Primary completion
- Jul 2017 (actual)
- Study completion
- Aug 2017 (actual)
- First posted
- 2 Nov 2018 (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.
Title :
A pilot single blind randomised controlled trial of the effect of a diet low in poorly digested carbohydrates on gastrointestinal form and symptoms in irritable bowel syndrome patients
Acronym: CRAIGS
Short title: Carbohydrate reduction and impact on gastrointestinal system Chief Investigator: Prof Robin Spiller
Objectives:
The purpose of this study is to:
- Investigate the proportion of patients with Irritable Bowel Syndrome who report moderate or substantial improvement in their symptoms after 2 weeks of following a diet low in Fermentable Oligo-Di-Monosaccharides and Polyols (FODMAPs) compared to patients who are on their habitual diet.
- Determine the difference in colonic volume of IBS patients receiving immediate low FODMAP dietary intervention after 2 weeks compared to patients who are not on the diet (delayed dietary intervention).
- Investigate the changes in self-reported food intolerance that occurs before dietary intervention.
Trial Configuration:
2-arm, parallel group, randomised, controlled trial
Setting :
Research clinic within NIHR Biomedical Research Unit, Secondary care
Detailed description
TRIAL / STUDY OBJECTIVES AND PURPOSE
The trial aims to investigate the effect of a diet low in FODMAPs on colonic morphology as well as in improving symptoms of irritable bowel syndrome (IBS).
This mechanistic information, along with the clinical data, will allow planning of larger, multi-centre studies of the low FODMAP diet in similar patients.
HYPOTHESES
- Patients on a low FODMAP diet for 2 weeks will have a decreased fasting colonic volume measured by Magnetic Resonance Imaging (MRI) compared to participants who have not started the diet.
- Patients with IBS are more likely to report a clinically important improvement in symptoms following the low FODMAP diet (immediate intervention) compared to those on their habitual diet (delayed intervention).
PRIMARY OBJECTIVE • To compare the proportion of IBS patients reporting a clinically important improvement in symptoms following a low FODMAP diet for 2 weeks against IBS patients who are on their habitual diet.
SECONDARY OBJECTIVES
- Determine the difference in fasting colonic volume of IBS patients receiving low FODMAP dietary intervention after 2 weeks compared to those on habitual diet.
TRIAL DESIGN
This will be a pilot single-blind, randomised, controlled trial (RCT). Since some activity will take place on the University of Nottingham this will be a multi-centre study.
All participants will receive advice from a dietitian on the low FODMAP diet. They will be randomised to one of two parallel treatment arms:
- Low FODMAP dietary advice (immediate intervention)
- Habitual diet (control - delayed intervention )
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Immediate Intervention | Active comparator | Other: Low FODMAP DietParticipants in this arm will receive an immediate low FODMAP dietary intervention on their second visit after they have been screened, consented and enrolled during visit 1. |
| Delayed Intervention | Placebo comparator | Other: Low FODMAP DietParticipants in this arm will receive a delayed Low FODMAP dietary intervention during their third visit after they have been been screened, consented and enrolled during visit 1. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (12 listed)
- Aged 18 and above
- Able to give informed consent
- Previous Diagnosis of IBS by medical practitioner
- Meeting ROME III criteria for IBS
- Investigations showing negative tissue transglutaminase (tTG) IgA antibodies
Key exclusion criteria (23 listed)
- Children (<18 years)
- History declared by the candidate of pre-existing gastrointestinal disorder, including but not limited to:
- Reported history of previous resection of any part of the gastrointestinal tract other than appendix or gallbladder
- Intestinal stoma
- Limited understanding of English
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 |
|---|---|---|
| Low FODMAP DietBoth arms will receive the intervention but at different time points. | Other | Delayed Intervention, Immediate Intervention |
Primary outcome
Adequate symptom relief between cases and controls
Time frame: Assessed in cases on their last day of the intervention (2 weeks after dietary change). Assessed in controls before they began their intervention (between 1-2 weeks before dietary changes)
Adequate symptom relief assessed by questionnaire after intervention in cases and before intervention in cases
2 secondary outcomes
Changes in colonic volume between cases and controls from baseline
Time frame: Measured : i) baseline (day 0), ii) last day of intervention (cases) (2 weeks after dietary change), iii) before intervention (2 weeks before dietary advice)
Changes in fermentation between cases and controls
Time frame: Measured : i) baseline (day 0), ii) last day of intervention (cases) (2 weeks after dietary change), iii) before intervention (2 weeks before dietary advice)
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 2 Nov 2018.
Related trials for Irritable Bowel Syndrome
Not yet recruiting
Acupuncture Combined With Transcutaneous Electrical Acupoint Stimulation for Constipation-Predominant Irritable Bowel Syndrome With Anxiety State
IBS, Constipation Predominant, Anxiety State
Not yet recruiting
Nutritional Management of the Irritable Bowel Syndrome(IBS): The Role of the Mediterranean Diet (MD)
Irritable Bowel Syndrome
Not yet recruiting
The Mechanism Underlying the Analgesic Effect of the Music of IBS Pain
Abdominal Pain/ Discomfort, Irritable Bowel Syndrome
Not yet recruitingPhase 3
Rifaximin Treatment in Bloating Predominant Functional Bowel Disorders
Bloating, Rifaximin
Not yet recruiting
NEUROMODULATION WITH TRANSCUTANEOUS AURICULAR VAGUS NERVE STIMULATION IN ADULTS WITH IRRITABLE BOWEL SYNDROME: A RANDOMIZED, SINGLE-BLIND, SHAM-CONTROLLED CROSSOVER STUDY
Irritable Bowel Syndrome (IBS)
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.
Robin Spiller, MD,FRCP principal investigator
University of Nottingham
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Low FODMAP Diet in people with Irritable Bowel Syndrome, run by University of Nottingham at 1 site in United Kingdom.
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 12 inclusion and 23 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 2 Nov 2018. 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 United Kingdom. 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. Some participants in this study may receive a placebo. 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?
Adequate symptom relief between cases and controls (time frame: Assessed in cases on their last day of the intervention (2 weeks after dietary change). Assessed in controls before they began their intervention (between 1-2 weeks before dietary changes)). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 2 Nov 2018.