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Related Concept Videos

Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy01:30

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Various diagnostic tests are employed in the diagnostic process for Inflammatory Bowel Disease (IBD), particularly to differentiate between Crohn's disease and ulcerative colitis.
Diagnostic studies
A colonoscopy is the definitive screening test, distinguishing ulcerative colitis from other colon diseases with similar symptoms. During a colonoscopy test, inflamed mucosa with exudate ulcerations can be observed, and biopsies are taken to determine the histologic characteristics of the...
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Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

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Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
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Inflammatory Bowel Disease II: Crohn's Disease01:30

Inflammatory Bowel Disease II: Crohn's Disease

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Introduction
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
Crohn's disease is a chronic, systemic inflammatory bowel disease (IBD) that predominantly affects the gastrointestinal tract. It is marked by...
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Chronic Bowel Disorders: Introduction01:17

Chronic Bowel Disorders: Introduction

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Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
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Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
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Assessment of the Gastrointestinal System II: Health Perception Pattern01:29

Assessment of the Gastrointestinal System II: Health Perception Pattern

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Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:
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Related Experiment Video

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Pre-Illness Index-Based Dietary Patterns and Inflammatory Bowel Disease Risk: A Systematic Review and Meta-Analysis.

Fanyi Meng1, Tao Zhang1, Xiangyu Meng1

  • 1Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, 300000, China.

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|July 23, 2025
PubMed
Summary

Dietary patterns significantly influence inflammatory bowel disease (IBD) risk. Adhering to Mediterranean or healthy diets may lower IBD risk, while pro-inflammatory diets increase it, especially in specific populations.

Keywords:
dietary inflammatory potential indexdietary patternsinflammatory bowel disease risk

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Area of Science:

  • Gastroenterology and Nutrition Science
  • Epidemiology
  • Public Health

Background:

  • Diet is a key modifiable environmental factor in inflammatory bowel disease (IBD) development.
  • Dietary patterns, reflecting complex food interactions, offer a comprehensive view of dietary impact.
  • Understanding pre-illness dietary habits is crucial for IBD risk assessment.

Purpose of the Study:

  • To evaluate the association between pre-illness dietary patterns and the risk of developing IBD.
  • To synthesize evidence from multiple studies using meta-analysis.

Main Methods:

  • A systematic literature search was performed across four major databases (PubMed, Web of Science, Embase, Cochrane Library).
  • A random-effects model was used to calculate pooled relative risks (RR) and 95% confidence intervals (CIs).
  • Subgroup analyses were conducted based on study design, region, age, and dietary index used.

Main Results:

  • Adherence to a Mediterranean diet (RR 0.66) and a "healthy dietary pattern" (RR 0.81) was associated with reduced IBD risk.
  • A pro-inflammatory diet was linked to an increased risk of Crohn's disease (RR 1.44).
  • Subgroup analysis indicated the Mediterranean diet's protective effect was not significant in adults, and pro-inflammatory diets increased ulcerative colitis risk in Asian studies.

Conclusions:

  • Pre-illness dietary patterns significantly impact IBD development.
  • Mediterranean and healthy dietary patterns are associated with lower IBD risk in the general population.
  • Pro-inflammatory diets increase IBD risk, with regional and demographic factors potentially modifying these effects.