Table 1B.

Histological scores

Score	Severity of inflammation	Extent of inflammation	Crypt damage
0	None	None	None
1	Mild	Mucosal	Basal 1/3
2	Moderate	Mucosal and submucosal	Basal 2/3
3	Severe	Transmural	Crypts lost but surface epithelium present
4			Crypts and surface epithelium lost