Ulcerative Colitis Disease Activity Index

**Semantic type:** Intellectual Product

**Definition:** A four-item instrument that utilizes a four-point rating scale to assess the severity of ulcerative colitis based on stool frequency, rectal bleeding, mucosal appearance at endoscopy, and physician rating of disease activity.

**Synonyms:** - Mayo Clinical Index for Ulcerative Colitis - Mayo Score for Ulcerative Colitis - UCDAI - Ulcerative Colitis Disease Activity Index (UCDAI)