Scoring system for the complex integrated disease activity index (Seo et al7)
| Variable | Score | Weighting |
| Bloody stool | ×60 | |
| Little or none | 0 | |
| Present | 1 | |
| Bowel movements/day | ×13 | |
| ⩽4 | 1 | |
| 5–7 | 2 | |
| ⩾8 | 3 | |
| Erythrocyte sedimentation rate (mm/h) | ×0.5 | |
| Haemoglobin (g/dl) | × −4 | |
| Albumin (g/dl) | × −15 | |
| Constant | 200 |
The final score is the total of the resulting values in the right hand column.