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Low-FODMAP Diet Improves Irritable Bowel Syndrome Symptoms: A Meta-Analysis

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Department of Life, Health and Environmental Sciences, Epidemiology and Biostatistics Unit, University of L’Aquila, 67100 L’Aquila, Italy
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Department of Life, Health and Environmental Sciences, Gastroenterology Unit, University of L’Aquila, 67100 L’Aquila, Italy
*
Author to whom correspondence should be addressed.
Nutrients 2017, 9(9), 940; https://doi.org/10.3390/nu9090940
Received: 15 June 2017 / Revised: 21 August 2017 / Accepted: 22 August 2017 / Published: 26 August 2017
Irritable bowel syndrome (IBS) affects 7–15% of the general population. A recently devised dietary approach consists of restricting foods with highly fermentable oligo-, di-, and monosaccharides, and polyols (FODMAPs), which can trigger and/or exacerbate IBS symptoms. The aim of this study is to use meta-analysis to provide an update on the randomised control trials (RCTs) and cohort studies, and examine them separately in relation to diet type. Papers were selected using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) flowchart. Cohen’s d and odds ratios were used as a measure of effect size for RCTs. A random effects model was used to account for different sources of variation among studies. Heterogeneity was assessed using Q statistics, I2, Tau, and Tau2. Publication bias was analysed and represented by a funnel plot, and funnel plot symmetry was assessed with Egger’s test. The results showed that in the RCTs, the patients receiving a low-FODMAP diet experienced a statistically significant pain and bloating reduction compared with those receiving a traditional diet; as regards to stool consistency, there was no significant difference between treatments. A significant reduction in abdominal pain and bloating were described by patients receiving a low-FODMAP diet compared with those receiving a high-FODMAP diet. In cohort studies, pain and bloating were significantly reduced after treatment compared with the baseline diet. We conclude that there is evidence that a low-FODMAP diet could have a favourable impact on IBS symptoms, especially abdominal pain and bloating. However, it remains to be demonstrated whether a low-FODMAP diet is superior to conventional IBS diets, especially in the long term. View Full-Text
Keywords: irritable bowel syndrome; nutrition; meta-analysis; epidemiology irritable bowel syndrome; nutrition; meta-analysis; epidemiology
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Altobelli, E.; Del Negro, V.; Angeletti, P.M.; Latella, G. Low-FODMAP Diet Improves Irritable Bowel Syndrome Symptoms: A Meta-Analysis. Nutrients 2017, 9, 940.

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