🧫 Partial Mayo Score (Ulcerative Colitis Activity)

When to use

Select stool frequency, rectal bleeding, and the physician's global assessment; the tool sums them (0–9) and bands the activity.

How it works

Partial Mayo = stool frequency (0–3) + rectal bleeding (0–3) + physician global assessment (0–3). ≤2 remission, 3–4 mild, 5–6 moderate, 7–9 severe.

Key points

• Clinical response is commonly defined as a decrease of ≥2 points and ≥30% with a fall in the rectal-bleeding subscore (original synthesis · not guideline verbatim).
• Remission generally requires the total ≤2 with no individual subscore >1.
• The full Mayo score adds the endoscopic subscore (0–3) for a 0–12 range and a more complete assessment.

References

• Lewis JD, et al. Use of the noninvasive components of the Mayo score to assess clinical response in ulcerative colitis. Inflamm Bowel Dis. 2008.
• Schroeder KW, et al. Coated oral 5-aminosalicylic acid therapy for mildly to moderately active ulcerative colitis. N Engl J Med. 1987.

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