Table 1.

Histological grading of colitis

Scoring parameter	Score definition
Inflammation severity	0 (None)
	1 (Mild)
	2 (Moderate)
	3 (Severe)
Inflammation extent	0 (None)
	1 (Mucosa)
	2 (Mucosa and submucosa)
	3 (Transmural)
	0 (None)
Crypt damage	1 (Basal 1/3 damaged)
	2 (Basal 2/3 damaged)
	3 (Crypts lost, surface epithelium present)
	4 (Crypts lost, surface epithelium lost)