Table 1.
Scoring of DSS-induced colitis activity index as described by Cooper et al.(1993)
| Score | Weight loss (%) | Stool consistency1 | Occult/gross bleeding |
| 0 | None | Normal | Normal |
| 1 | 1~5 | − | − |
| 2 | 5~10 | Loose stools | Hemoccult positive |
| 3 | 10~20 | − | − |
| 4 | >20 | Diarrhea | Gross bleeding |
DSS colitis activity index=(combined scores of weight loss (compared to Day 1 of the experiment), stool consistency and bleeding)/3;
1
Normal stools: Well formed pellets; Loose stools: Pasty and semi-formed stools which do not stick to the anus; Diarrhea: Liquid stools that stick to the anus