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Partial Mayo score (ulcerative colitis)

Noninvasive Mayo version (0 to 9), without endoscopy. Tracks ulcerative colitis activity between colonoscopies and treatment response.

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Check the population, units and version. The result shows the formula or classification; it does not make an automatic treatment decision.

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Method · Limits of application

Partial Mayo/Lewis 2008: 3 items 0–3, total 0–9, without endoscopic component

Partial Mayo is a measure of activity and response in ulcerative colitis, with three components and no endoscopy; it is not equivalent to full Mayo and does not assess endoscopic healing. Lewis 2008 analyzed 105 patients with mild to moderate disease in a 12-week trial and compared change with patient-perceived improvement. That design does not establish universal performance in severe disease, children or other colitides. Record the symptom period and physician’s assessment; the total does not determine treatment alone.

Conditions of use

Check the population, units, inclusion and exclusion criteria, and version in the original source. A result alone does not establish a diagnosis, discharge decision or prescription.

Documented parameters

Stool frequency
Rectal bleeding
Physician global assessment

3/3 reference cases checked. Numerical tests are not clinical validation.

Sources and documentation

Documented formula

Transcribed from the source or a recorded revision; this is not a clinical recommendation.

Stool frequency (0 to 3) + rectal bleeding (0 to 3) + physician global assessment (0 to 3). Total 0 to 9.

Full Mayo (0 to 12) adds endoscopic appearance (0 to 3).

References

Identifier: escore-de-mayo-parcial

Original clinical content: Brazilian Portuguese.

Method version

Partial Mayo/Lewis 2008: 3 items 0–3, total 0–9, without endoscopic component

escore-de-mayo-parcial@native-2026-10-03+41240bcca26d

Source for the active edition

The bibliographic edition identifies the source. By itself, it proves neither full conformity of the formula nor clinical approval.

Synthetic cases checked (3)

Synthetic cases for checking the implementation, with no patient data.

Case 1

reference-001

Inputs

Stool frequency: 1 to 2 more than normal
Rectal bleeding: Blood in fewer than half of bowel movements
Physician global assessment: Normal

{
  "freq": "1",
  "sang": "1",
  "global": "0"
}

Expected result

{
  "score": 2,
  "level": "low"
}

Actual result

{
  "score": 2
}

Case 2

reference-002

Inputs

Stool frequency: 1 to 2 more than normal
Rectal bleeding: Blood in fewer than half of bowel movements
Physician global assessment: Mild disease

{
  "freq": "1",
  "sang": "1",
  "global": "1"
}

Expected result

{
  "score": 3,
  "level": "mid"
}

Actual result

{
  "score": 3
}

Case 3

reference-003

Inputs

Stool frequency: 5 or more additional
Rectal bleeding: Blood in half or more
Physician global assessment: Moderate

{
  "freq": "3",
  "sang": "2",
  "global": "2"
}

Expected result

{
  "score": 7,
  "level": "mid"
}

Actual result

{
  "score": 7
}

Code and reproducibility

This tool’s code on GitHub

Download code and tests

Sources, version and reproduction instructions

The code tests are technical checks. Clinical approval and professional translation review are recorded separately.

Relationship with cancer research

General context — relationship to be defined

A resource for general clinical contexts. This edition does not assign a specific oncological relationship; selecting it for a study requires a justified question, population and purpose.