Full Mayo score in ulcerative colitis
Adds the four clinical and endoscopic Mayo items and grades ulcerative colitis activity.
When to use
Ulcerative colitis where activity is measured with the four Mayo items, endoscopy included.
Pearls and pitfalls
- Each of the four items runs from 0 to 3, so the total runs from 0 to 12.
- Endoscopy is required in the full Mayo: without it, use the partial Mayo.
- The bands are 0 to 2 remission, 3 to 5 mild, 6 to 10 moderate and above 10 severe.
- The score mixes symptom and mucosa, so clinical improvement without endoscopic improvement shows in the total.
Fill in the fields to see the result.
Formula
Mayo = stool frequency + rectal bleeding + mucosal appearance + global assessment, each 0 to 3.
Evidence
Classic ulcerative colitis activity instrument, with 0 to 3 anchors per item and published activity bands.
References
- Association between ulcerative colitis, mental health, and quality of life in a Pakistani cohort: a cross-sectional analysis. PLoS One. 2026;21(7):e0356531. Components of the Mayo score used for disease severity. doi:10.1371/journal.pone.0356531
Frequently asked questions
What is Full Mayo score in ulcerative colitis?
Adds the four clinical and endoscopic Mayo items and grades ulcerative colitis activity. Ulcerative colitis where activity is measured with the four Mayo items, endoscopy included.
How is the result calculated?
Mayo = stool frequency + rectal bleeding + mucosal appearance + global assessment, each 0 to 3.
How should the result be interpreted?
Classic ulcerative colitis activity instrument, with 0 to 3 anchors per item and published activity bands.
What are the sources?
Association between ulcerative colitis, mental health, and quality of life in a Pakistani cohort: a cross-sectional analysis. PLoS One. 2026;21(7):e0356531. Components of the Mayo score used for disease severity.