Table 3.

Ulcerative colitis disease activity index (UCDAI).

Score	Stool frequency	Rectal bleeding	Mucosal appearance	Disease activity rated by physicians
0	Normal	None	Normal	Normal
1	1–2 Stools/day	Streaks of blood	Mild friability	Mild
2	3–4 Stools/day	Obvious blood	Moderate friability	Moderate
3	> 4 Stools/day	Mostly blood	Exudation, spontaneous bleeding	Severe