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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

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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
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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
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Chronic Bowel Disorders: Introduction01:17

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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.
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Related Experiment Video

Updated: Oct 19, 2025

Investigating Intestinal Inflammation in DSS-induced Model of IBD
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The Process of Developing a Disease Activity Index in Microscopic Colitis.

Katarina Pihl Lesnovska1, Andreas Münch1, Ole Bonderup2

  • 1Department of Gastroenterology and Hepatology in Linköping, and Department of Health, Medicine, and Caring Sciences, Linköping University, Linköping, Sweden.

Journal of Crohn'S & Colitis
|September 25, 2021
PubMed
Summary
This summary is machine-generated.

A new patient-reported outcome measure, the European Microscopic Colitis Activity Index (E-MCAI), was developed to assess microscopic colitis disease activity. This tool shows good content validity and aims to meet FDA requirements for patient-reported outcome measures.

Keywords:
Microscopic colitisPROMdisease activity indexinstrument development

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Area of Science:

  • Gastroenterology
  • Clinical Outcome Assessment

Background:

  • Microscopic colitis (MC) requires patient-reported outcome measures (PROMs) to assess disease impact on daily life.
  • Current PROMs may not fully meet regulatory standards for assessing MC disease activity.

Purpose of the Study:

  • Develop a PROM for microscopic colitis disease activity assessment.
  • Ensure the developed PROM aligns with Food and Drug Administration (FDA) guidelines.

Main Methods:

  • The European Microscopic Colitis Activity Index (E-MCAI) was developed through expert and patient consensus.
  • Content validity was established using the Content Validity Index with 14 experts and 79 patients.
  • Cognitive interviews and a pilot survey refined the E-MCAI's questions and usability.

Main Results:

  • Seven key symptoms of active MC demonstrated content validity: stool consistency, frequency, nocturnal stools, urgency, incomplete evacuation, leakage, and abdominal pain.
  • The final E-MCAI comprises six questions, reflecting core aspects of microscopic colitis activity.
  • The development process adhered to FDA-recommended methodologies.

Conclusions:

  • The E-MCAI is a newly developed PROM for microscopic colitis.
  • Initial evaluations indicate good content validity, meeting FDA development standards.
  • Further studies are planned to establish construct validity, reliability, and responsiveness.