The Therapeutic Effect of Shark Liver Oil in a Rat Model of Acetic Acid-Induced Ulcerative Colitis

Table 1

Histological grading of ulcerative colitis.

Scoring parameters	Score definition
Inflammation severity	0: none; 1: mild; 2: moderate; 3: severe
Inflammation extent	0: none; 1: mucosa; 2: mucosa and submucosa; 3: transmural
Crypt damage	0: none; 1: basal 1/3 damaged; 2: basal 2/3 damaged; 3: crypts lost, surface epithelium intact; 4: crypts lost, surface epithelium lost
Percentage of involvement	0: 0%; 1: 1–25%; 2: 26–50%; 3: 51–75%; 4: 76–100%
Regeneration	0: complete regeneration or normal tissue; 1: almost complete regeneration; 2: regeneration with crypt depletion; 3: surface epithelium not intact; 4: no tissue repair