CD		UC
Characteristic	Points	Characteristic	Points
Inflammatory*	0	Anemia	1
Obstructing*	2	Requirement for blood transfusion	1
Fistulizing*	4	Malnutrition	2
No anemia	0	Total parental nutrition (TPN)	2
Anemia	1	Admission to teaching hospital	1
Requirement for blood transfusion	1
No malnutrition/TPN	0
Malnutrition	2
TPN	1
Volume depletion	1
Admission to teaching hospital	1
Clostridium diffcile Infection	1
Risk stratification for severity	CD		UC
Low severity	0–1	Low severity	0–1
Intermediate severity	2–4	Intermediate severity	2–3
Severe severity	≥5	Severity	≥4

*Only one disease behavior is assigned per hospitalization.

Risk score to predict sever hospitalization course among patients with either ulcerative colitis (UC) or Crohn' disease (CD).