Crohns_Disease_Activity_Index_CDAI v.1
Crohn's Disease Activity Index (CDAI) determines the current severity of Crohn’s disease.
Used for adults with active Crohn’s disease.
Signs, symptoms, and history should be based on the past 7 days. Note: for abdominal pain and general well-being ratings, this calculator uses an average rating per day over the past 7 days. For stools, use the total number of soft/liquid stools over the past 7 days. The answer of each criteria will be multiplied by a multiplier which will give points towards the final score. The CDAI is calculated using the following formula: CDAI = Number of liquid stools * 2 + Points for abdominal pain * 5 + Points for general well-being * 7 + Points for extra-intestinal/physical complaints * 20 + Points for antidiarrheal drugs * 30 + Points for abdominal mass * 10 + (Expected – observed hematocrit) * 6 + Body weight [% below ideal weight] Score interpretation: -CDAI <150 is a marker of remission of Crohn’s disease -CDAI of 150-450 is used as a marker of active Crohn's disease -CDAI >450 is a marker of severe Crohn's disease
Note that the CDAI may have wide variation in definitions and scoring in real world use. Lab variations of “normal” hematocrit in men and women can often lead to markedly different CDAI scores; similarly, changes in weight can lead to score differences as well.
1. Best WR, Becktel JM, Singleton JW, Kern Jr F. Development of a Crohn's disease activity index: National Cooperative Crohn's Disease Study. Gastroenterology. 1976 Mar 1;70(3):439-44.
openEHR-EHR-OBSERVATION.body_weight, openEHR-EHR-OBSERVATION.ideal_body_weight, openEHR-EHR-OBSERVATION.basic_demographic, openEHR-EHR-OBSERVATION.crohns_disease_activity_index_cdai, openEHR-EHR-EVALUATION.crohns_disease_activity_index_cdai
