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Calculator: Mayo score for assessing ulcerative colitis activity in adults

Calculator: Mayo score for assessing ulcerative colitis activity in adults

Stool pattern

Patient reports a normal number of daily stools (0 points)

One to two more stools than normal (1 point)

Three to four more stools than normal (2 points)

Five or more stools than usual (3 points)
Most severe rectal bleeding of the day

None (0 points)

Blood streaks seen in the stool less than half the time (1 point)

Blood in most stools (2 points)

Pure blood passed (3 points)
Endoscopic findings

Normal or inactive colitis seen (0 points)

Mild colitis: mild friability, erythema, decrease in vascuality (1 point)

Moderate colitis: friability, marked erythema, vascular pattern absent, erosions seen (2 points)

Severe colitis: ulcerations and spontaneous bleeding (3 points)
Global assessment by clinician

Normal (0 points)

Mild colitis (1 point)

Moderate colitis (2 points)

Severe colitis (3 points)

Important: Inputs must be complete to perform calculation.

Total criteria point count:
  • Scores range from 0 to 12, with higher scores correlating with more severe disease.
  • Please see appropriate UpToDate topic reviews for further information.

Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer.

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Topic 15644 Version 11.0