Diagnostic Criteria for Disorders of Gut-Brain Interaction

Overview of Diagnostic Approach

The Rome Foundation recommends using the Rome IV criteria for diagnosing disorders of gut-brain interaction, which include specific diagnostic thresholds for symptom frequency, severity, and duration 1

For Irritable Bowel Syndrome (IBS) diagnosis, the Rome IV criteria require recurrent abdominal pain at least 1 day per week in the last 3 months, with symptom onset at least 6 months before diagnosis, associated with two or more of: pain related to defecation, change in stool frequency, or change in stool form 2
The American Gastroenterological Association suggests that approximately 50% of patients who met Rome III criteria no longer qualify for IBS diagnosis using Rome IV criteria, resulting in a global prevalence drop from 10.1% to 4.1% 2

The Rome Foundation recommends that functional dyspepsia requires one or more bothersome symptoms (epigastric pain, epigastric burning, postprandial fullness, or early satiation) present for the last 3 months, with symptom onset at least 6 months before diagnosis, and no structural disease on upper endoscopy to explain symptoms 3, 4
The term "bothersome" specifically means symptoms severe enough to interfere with daily activities, according to the European Society of Gastrointestinal Motility 3, 5

Epigastric Pain Syndrome (EPS) requires bothersome epigastric pain or burning at least 1 day per week, and pain may occur with meals, be relieved by meals, or occur while fasting, as suggested by the American College of Gastroenterology 3, 4
Postprandial Distress Syndrome (PDS) requires bothersome postprandial fullness or early satiation at least 3 days per week, and symptoms are meal-triggered, according to the European Society of Gastrointestinal Motility 3, 5

The Rome Foundation acknowledges that requiring symptoms for 3 months with onset 6 months prior is too restrictive for routine care and potentially delays diagnosis and treatment, and developed less restrictive "clinical criteria" requiring only 8 weeks of cardinal symptoms for practical use 3, 5
Approximately 80% of patients with dyspepsia symptoms will have functional dyspepsia after endoscopy excludes structural disease, as reported by the American Gastroenterological Association 4

The American College of Gastroenterology recommends evaluating for warning signs requiring further investigation, including rectal bleeding and nocturnal symptoms, before applying symptom-based criteria for IBS and FD 2
Upper endoscopy is required by definition to exclude structural disease in FD, as suggested by the European Society of Gastrointestinal Motility 3, 5, 4

The Rome IV criteria identify patients with more severe symptoms and higher psychological comorbidity compared to Rome III, according to the American Psychiatric Association 2
Once a functional diagnosis is established using appropriate criteria and limited investigation, the incidence of new non-functional diagnoses is extremely low, as reported by the American Gastroenterological Association 2