Crohn's Disease Activity Index (CDAI)
Enter the 7-day diary and examination findings, then print the completed form for a PBS authority application. Standard weight is filled in from thePBS standard body weight table. Nothing entered here is saved or sent anywhere.
CDAI score
| Component | Value | Multiplier | Points |
|---|---|---|---|
| Total CDAI | Incomplete | ||
Signature: ______________________________ Date: ________________
How the score is calculated
| Component | Multiplier |
|---|---|
| Number of liquid or very soft stools, total over 7 days | × 2 |
| Abdominal pain rating (0 to 3), total over 7 days | × 5 |
| General wellbeing rating (0 to 4), total over 7 days | × 7 |
| Number of complications (listed above) | × 20 |
| Loperamide, diphenoxylate or opiates for diarrhoea (0 or 1) | × 30 |
| Abdominal mass (none 0, questionable 2, definite 5) | × 10 |
| Haematocrit: 47 minus haematocrit (men) or 42 minus haematocrit (women) | × 6 |
| Body weight: percentage below standard weight, (standard − current) ÷ standard × 100, with a maximum deduction of −10 for patients above standard weight | × 1 |
Commonly used categories: under 150 remission, 150 to 219 mildly active, 220 to 450 moderately active, over 450 severely active.
Reference
Best WR, Becktel JM, Singleton JW, Kern F Jr. Development of a Crohn's disease activity index. National Cooperative Crohn's Disease Study. Gastroenterology. 1976;70(3):439-444.