Select the presence of pain and associated symptoms to visualize the Rome IV diagnostic profile.
Guidelines & Evidence
Clinical Details
Section 1
When to Use
When to Use
Diagnosis of Disorders of Gut-Brain Interaction (DGBI), formerly called Functional GI Disorders
Applying standardized criteria for IBS, Functional Dyspepsia, and Functional Constipation
Used to minimize unnecessary invasive testing once "Red Flags" are excluded
The 'Red Flag' Rule
Rome IV criteria should only be applied after excluding "Alarm Features" (Red Flags) like weight loss, nocturnal symptoms, anaemia, or blood in the stool, which mandate organic workup (e.g., Colonoscopy).
Section 2
Formula & Logic
Universal Time Requirement
Symptoms must have started at least 6 months prior to diagnosis and must be active (meeting criteria) during the last 3 months.
Core DGBI Definitions
01
IBS: Recurrent abdominal pain (at least 1 day/week) related to defecation or change in stool frequency/form.
02
Functional Dyspepsia: Epigastric pain or burning, early satiety, or post-prandial fullness, with no organic cause.
03
Functional Constipation: Difficult, infrequent, or incomplete defecation that does not meet IBS criteria.
Symptom Associations
Pain + Defecation
IBS
Pain (No defecation link)
Functional Dyspepsia or Centrally Mediated Pain
Bloating (Isolated)
Functional Abdominal Bloating/Distension
Section 3
Pearls/Pitfalls
Rome IV vs. Rome III
Rome IV (2016) removed the term "discomfort" from the IBS definition, focusing strictly on "pain." It also increased the frequency threshold from 3 days/month to 1 day/week. This change has made the IBS diagnosis more specific, often identifying a "sicker" population than Rome III.
Gut-Brain Axis
The transition from "Functional" to "Gut-Brain Interaction" acknowledges that symptoms are not "in the patient's head" but are the result of visceral hypersensitivity and abnormal communications between the ENS and CNS.
Clinical Pearls
In patients < 45-50 years old with no alarm features, the "Positive Diagnostic Strategy" (applying Rome criteria) is both safe and cost-effective
Functional Constipation allows for "hard stools" but requires the absence of abdominal pain related to the stooling
Over 70% of IBS patients also meet criteria for Functional Dyspepsia (Overlap Syndrome)
Section 4
Next Steps
Management Priority
01
IBS confirmed: Subtype by Bristol Stool Scale (IBS-C, D, or M); Start Low-FODMAP trial or Secretagogues.
02
Functional Dyspepsia: Check H. pylori status; trial of PPI or Prokinetics.
Complementary Tools
Bristol Stool Form Scale
IBS-SSS (Symptom Severity)
FODMAP Reintroduction Algorithm
Section 5
Evidence Appraisal
The Global Standard
Rome IV-Functional GI Disorders: Disorders of Gut-Brain Interaction.
Drossman DA et al. • Gastroenterology. 2016;150(6):1257-1261. The defining consensus report.
Beginning in 1989, a group of international experts has met every 6–10 years in Rome to standardize these criteria. Led by Douglas Drossman, the foundation has successfully moved DGBIs from "diagnoses of exclusion" to "positive clinical diagnoses."
