MDCalc

Mayo Score/Disease Activity Index (DAI) for Ulcerative Colitis

Assesses severity of ulcerative colitis.

Stool frequency

Rectal bleeding

3 points requires patients to have ≥50% of BMs with visible blood AND ≥1 BM with blood alone.

Mucosal appearance at endoscopy

Physician rating of disease activity

Result:

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Advice
  • Not designed to predict need for admission or surgical therapy
  • However, an endoscopic score of 0 is associated with lower risk of colectomy compared to higher scores. (Manginot 2016)
Critical Actions

If endoscopic data are not available, the modified Mayo score performs equally well. (Lewis 2008)

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