Mayo Score / Disease Activity Index (DAI)

Mayo Score / Disease Activity Index

Stool Frequency :
Rectal Bleeding :
Endoscopic Findings :
Physician Global Assessment :

Known as the Mayo score or the Disease Activity Index (DAI) for ulcerative colitis it was developed in 1987 as a scoring mechanism to have the patient serve as their own control.

Formula :

Composite score of listed variables. Points given for each variable.

Explanation of Result :

Patient score is in reference to their previous scores to determine change in function.

* Please verify all calculations prior to clinical use.


  • 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 Dec 24;317(26):1625-9. PMID: 3317057.