Is-it possible to distinguish irritable bowel syndrome with constipation from functional constipation?

Area of Science:

• Gastroenterology
• Digestive Health
• Clinical Diagnostics

Background:

• The Rome III criteria distinguish functional constipation (FC) from constipation-predominant irritable bowel syndrome (IBS-C).
• Understanding symptom and transit time differences is crucial for accurate diagnosis.
• This study aimed to differentiate between FC and IBS-C patients.

Purpose of the Study:

• To identify differences in symptom intensity between FC and IBS-C patients.
• To compare total and segmental colonic transit times in FC versus IBS-C.
• To determine the most effective parameters for classifying constipation subtypes.

Main Methods:

• Prospective evaluation of 337 outpatients with chronic constipation.
• Rome III criteria used for FC and IBS-C classification.
• Symptom intensity (Likert scale), Bristol stool scale, and colonic transit time measured.

Main Results:

• IBS-C patients reported higher symptom intensity, particularly bloating and abdominal pain.
• No significant differences were found in stool form or colonic transit time between groups.
• Bloating and abdominal pain alone achieved 71% correct classification of IBS-C versus FC.

Conclusions:

• Self-reported symptom intensity, specifically abdominal pain and bloating, is more valuable than colonic transit time for differentiating IBS-C from FC.
• These subjective symptoms aid in accurate patient phenotyping.
• Clinical assessment of pain and bloating can improve diagnostic accuracy for constipation subtypes.