Comparison Between Low FODMAP and SSRD in IBS

NCT ID: NCT05192603

Last Updated: 2025-12-09

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ENROLLING_BY_INVITATION

Clinical Phase

NA

Total Enrollment

200 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-03-01

Study Completion Date

2029-03-31

Brief Summary

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The aim of the present study is to compare the efficiency of low FODMAP and SSRD to reduce symptoms in IBS, and to study the mechanisms and consequences of the two diets.

Detailed Description

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The investigator will perform a study on 200 subjects with verified irritable bowel syndrome (IBS). Participants will be recruited from the clinic of Gastroenterology or Internal medicine as well as primary health care centers. At the start of the study, participants will complete protocols concerning Rom IV criteria (to validate that the IBS criteria are ful-filled) as well as IBS symptom rating scales irritable bowel syndrome-symptoms severity scores (IBS-SSS) and visual analog scale for irritable bowel syndrome (VAS-IBS). The Item Health Survey 1.0 (distributed by RAND), RAND-36, includes the same items as those in the Short-Form Health Survey (SF-36), and evaluates the quality of Life. SCOFF is a brief questionnaire that asks the five questions about eating disturbances (Do you make yourself Sick because you feel uncomfortably full? Do you worry you have lost Control over how much you eat? Have you recently lost more than One stone in a 3 month period? Do you believe yourself to be Fat when others say you are too thin? Would you say that Food dominates your life?). Participants will be examined by an investigator who will complete protocols of clinical data. Blood and fecal samples will be collected by the investigator.

Study participants will thereafter be randomized to receive either low FODMAP (Fermentable, Oligo-, Di-, Mono-saccharides And Polyols) diet (n=100), or a SSRD diet (starch ans sucrose-reduced diet) (n=100). After 4 weeks of dietary intervention, there will be a follow-up where blood and fecal samples are once again collected. At this point in time, participants will also fill in IBS symptom rating scales again.

The participants are then free to eat whatever they want to, and another 5 months later, they will be examined again, the same protocols will be completed, and blood and fecal samples are collected.

The investigator will use samples from baseline, 4 weeks and 6 months, for genetic/epigenetic (including genomic-wide association studies), metabolomics, proteomics, nutritional data, gut microbiota, and inflammatory parameter analyses.

Statistics

The investigator will use Mann-Whitney U-test and Wilcoxon test to study differences in the above-mentioned parameters between the two treatment groups, as well as before and after dietary intervention, respectively. For analyses of genetic/epigenetics, metabolomics, proteomics, and microbiota, the investigator will use bioinformatics and biostatistics.

Conditions

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IBS - Irritable Bowel Syndrome

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Randomized, open study for dietary intervention
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Dietary intervention with Low FODMAP

The participants are given oral and written instructions on which diet that contains low contents of FODMAP.

Group Type EXPERIMENTAL

low FODMAP or SSRD

Intervention Type DIETARY_SUPPLEMENT

The participants are given oral and written information about each diet. No food is delivered from the investigator to the participant

Dietary intervention with SSRD

The participants are given oral and written instructions on which diet that contains SSRD.

Group Type EXPERIMENTAL

low FODMAP or SSRD

Intervention Type DIETARY_SUPPLEMENT

The participants are given oral and written information about each diet. No food is delivered from the investigator to the participant

Interventions

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low FODMAP or SSRD

The participants are given oral and written information about each diet. No food is delivered from the investigator to the participant

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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Inclusion Criteria

* Verified IBS according to Rom IV criteria.

Exclusion Criteria

* Serious mental disease
* Serious somatic disease
* Abuse
* Inability to understand the Swedish language
* Already on a diet
Minimum Eligible Age

18 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Region Skane

OTHER

Sponsor Role lead

Responsible Party

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Bodil Ohlsson

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Bodil Ohlsson, Professor

Role: PRINCIPAL_INVESTIGATOR

Department of Internal Medicine

Bodil Roth, PhD

Role: STUDY_CHAIR

Department of Internal Medicine

Locations

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Deartment of INternal Medicine

Malmo, , Sweden

Site Status

Countries

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Sweden

References

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Roth B, Ohlsson B. Overweight and vitamin D deficiency are common in patients with irritable bowel syndrome - a cross-sectional study. BMC Gastroenterol. 2024 Sep 3;24(1):296. doi: 10.1186/s12876-024-03373-x.

Reference Type DERIVED
PMID: 39227769 (View on PubMed)

Roth B, Ohlsson B. Challenges of recruitment processes to a randomized dietary trial in irritable bowel syndrome. F1000Res. 2024 Jun 24;13:323. doi: 10.12688/f1000research.147710.2. eCollection 2024.

Reference Type DERIVED
PMID: 38939366 (View on PubMed)

Roth B, Ohlsson B. A starch- and sucrose-reduced diet may lead to improvement of intestinal and extraintestinal symptoms in more conditions than irritable bowel syndrome and congenital sucrase-isomaltase deficiency. Nutrition. 2024 Jan;117:112254. doi: 10.1016/j.nut.2023.112254. Epub 2023 Oct 8.

Reference Type DERIVED
PMID: 37924624 (View on PubMed)

Other Identifiers

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IBS-2021

Identifier Type: -

Identifier Source: org_study_id

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