Clinical activity in ulcerative colitis without endoscopy, using stool frequency, rectal bleeding and the physician's global assessment. Suited to interval review between endoscopic assessments.
What is scored
The calculator collects 3 items:
Stool Frequency
Rectal Bleeding
Physician's Global Assessment
Any item left blank stops the score being calculated — an incomplete form never reports as remission.
Interpretation
0 - 1
Remission
2 - 4
Mild
5 - 6
Moderate
7 - 9
Severe
Bands as implemented in IBD Care. A band is a description of the score, not an instruction.
Limitations
Omits the endoscopic subscore, so it cannot speak to mucosal healing, and symptomatic remission frequently coexists with endoscopic activity. The physician global assessment is subjective and reduces reproducibility between observers.
References
Schroeder KW, Tremaine WJ, Ilstrup DM. Coated oral 5-aminosalicylic acid therapy for mildly to moderately active ulcerative colitis. A randomized study. N Engl J Med 1987;317:1625-9. PMID 3317057. doi:10.1056/NEJM198712243172603
Content last reviewed 2026-10-10. References were resolved against PubMed, a service of the US National Library of Medicine, which does not endorse this site.
Use the calculator
Partial Mayo Score is implemented as an interactive calculator in IBD Care, with its full guidance and scoring bands.