Pouchitis Disease Activity Index1284
| Variable | Score |
| Clinical | |
| Stool frequency (daily) | 0–2 (0=usual post-operative frequency, 1=1–2 stools more than post-operative frequency, 2=>3 stools more than post-operative frequency) |
| Rectal bleeding | 0–1 (0=absent/rare, 1=present daily) |
| Urgency/abdominal cramps | 0–2 (0=absent, 1=occasional, 2=usual) |
| Fever (>37.8°C/100.5oF) | 0–1 (0=absent, 1=present) |
| Endoscopic inflammation | One point for each of: oedema, granularity, friability, loss of vascular pattern, mucous exudate, ulceration) |
| Histology | |
| Polymorphonuclear leucocyte infiltration | 1–3 (1=mild, 2=moderate + crypt abscesses, 3=severe + crypt abscesses) |
| Mean ulceration per low power field | 1–3 (1 =<25%, 2=25–50%, 3 =>50% ulceration) |
Pouchitis, total score ≥7 points; Remission, score ≤2 with endoscopic subscore ≤1.