Table 1.

Inflammation score calculation criteria.

	Score	0	1	2	3	4
I	Inflammation	none	mild	moderate	severe	---
E	Extend	none	mucosa and submucosa	transmural	---	---
R	Regeneration	complete regeneration	almost complete regeneration	regeneration with crypt deletion	surface epithelium not intact	no tissue repair
C	Crypt damage	none	1/3 of basal damaged	2/3 of basal damaged	only surface epithelium intact	entire crypt and epithelium lost
P	Percent involvement	none	1–25%	26–50%	51–75%	76–100%