Gastroenterology · Primary Care
Rome IV Irritable Bowel Syndrome calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Allowed range: 0–7 days/week
Allowed range: 0–240 months
Allowed range: 0–12 months
Allowed range: 0–100 %
Percent of stools that are Bristol type 1 or 2. At least 25% defines the hard-stool pattern.
Allowed range: 0–100 %
Percent of stools that are Bristol type 6 or 7. At least 25% defines the loose-stool pattern.
Result
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Clinical inputs
- Days per week with abdominal pain (days/week)Accepted range: 0 to 7
- Months since symptom onsetAccepted range: 0 to 240
- Months in the past year during which criteria were metAccepted range: 0 to 12
- Pain related to defecation
- Change in stool frequency
- Change in stool form
- Percent of stools that are hard (Bristol 1–2) (%)Accepted range: 0 to 100
- Percent of stools that are loose (Bristol 6–7) (%)Accepted range: 0 to 100
Primary source
Lacy BE, Mearin F, Chang L, et al. Bowel disorders. Gastroenterology. DOI: 10.1053/j.gastro.2016.02.031. PMID: 27144627. Recurrent abdominal pain at least 1 day per week for the last 3 months, with onset at least 6 months earlier, plus at least 2 of: related to defecation, change in frequency, change in form. Subtype uses the Bristol 1–2 and 6–7 proportions (IBS-C, IBS-D, IBS-M, IBS-U). (2016)
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