Table 2.

Histology injury scores.

Feature	0	1	2	3	4
Inflammation	None	Mild	Moderate	Severe	—
Mucosal damage	None	Mucous layer	Submucosa	Muscularis and serosa	—
Crypt damage	None	0%-33%	34%-66%	67%-100%	100% epithelium loss
Range of pathological change	None	0%–25%	26%–50%	51%–75%	76%–100%