Total CDAI is the sum of eight weighted components recorded over the previous 7 days.

Component	Input	Weighting
Stool frequency	Total liquid or very soft stools over 7 days	Sum × 2
Abdominal pain	Average daily score 0-3	Average × 7 × 5
General well-being	Average daily score 0-4	Average × 7 × 7
Extraintestinal complications	Count of listed complications	Count × 20
Antidiarrhoeal therapy	No=0, Yes=1	Value × 30
Abdominal mass	None=0, questionable=2, definite=5	Score × 10
Haematocrit deviation	Men: 47 - observed. Women: 42 - observed	Difference × 6
Weight deviation	100 × (1 - current/ideal)	Minimum contribution -10

Crohn's Disease Activity Index (CDAI)