Table 4.

The pouchitis activity score

Criteria	Score
Clinical
Stool frequency/24 h: < 8/8-10/10-13/> 13	0/2/4/6
Urgency: absent/present	0/3
Rectal bleeding: absent/present	0/3
Endoscopic findings
Edema: absent/present	0/1
Granularity: absent/present	0/1
Friability: absent/mild/severe	0/1/2
Erythema: absent/mild/severe	0/2/3
Mucosal flattening: absent/present	0/2
Ulcerations/erosions: absent/mild/severe	0/2/3
Histological findings
Acute histological inflammation
Polymorphonuclear leucocyte infiltration	0/1/2/3
absent/discrete and patchy/moderate ± crypt abscesses or cryptitis/
extensive ± crypt abscesses or cryptitis
Ulcerations/erosions	0/1/2/3
absent/mild and superficial/moderate/extensive
Chronic histological inflammation
Polymorphonuclear leucocyte infiltration	0/1/2/3
absent/mild and patchy/moderate/extensive
Villous atrophy	0/1/2/3
absent/minimal/partial/subtotal-total
Total pouchitis activity score (max 36)
Pouchitis ≥ 13