Galen eCalcs - Calculator: Crohn's Activity Index

Description

The Crohn’s Disease Activity Index is a tool used to quantify the symptoms of patients with Crohn’s disease.

Remission of Crohn's disease is defined as a fall in the CDAI of less than 150. Severe disease is defined as a value of greater than 450. Most major research studies on medications in Crohn's disease define response as a fall of the CDAI of greater than 70 points.

Calculator Inputs

Input	Mapping Type	Description
Sex	Demographics	Patient Sex
Number of liquid of soft stools	Manual Input	Number of liquid stools in one week
Abdominal Pain	Manual Input	Patient’s average daily abdominal pain
General well-being	Manual Input	Patient’s average daily general well-being
Arthritis / Arthralgia	Problems	Patient has arthritis or arthralgia
Iritis or uveitis	Problems	Patient has Iritis or Uveitis
Erythema / Pyoderma Gangrenosum / Apththous Stomalitis	Problems	Patient has erythema, pyoderma gangrenosum, or apththous stomalitis
Anal Fissure / Fistual / Perirectal Abscess	Problems	Patient has an anal fissure, fistula, or perirectal abscess
Bowel-Related Fistula	Problems / No Default Mappings	Patient has a bowel-related fistula
Febrile Episode	Manual Input	Patient has experienced febrile (fever) episode over 100 degrees in the past week
Lomotil / Opiates	Medications	Patient is taking Lomotil or Opiates for diarrhea
Abnormal Mass	Manual Input	Patient has an abnormal mass
Hematocrit Inclusion	Manual Input	Hematocrit Inclusion
Hematocrit	Results	The volume percentage of red blood cells in blood
Weight Changes	Manual Input	Whether or not the patient is experiencing weight changes related to condition
Current Weight	Vitals	Patient’s current weight
Standard Weight	Manual Input	Patient’s standard weight

Calculator Outputs

Output	Mapping Type	Description
Activity Index	Result	Crohn’s disease index

References

http://en.wikipedia.org/wiki/Crohn%27s_Disease_Activity_Index
http://www.ibdjohn.com/cdai/