Galen eCalcs - Calculator: Crohn's Activity Index

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Crohn's Disease Activity Index.JPG


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 Search/Filter Keywords

At the calculator level, eCalcs comes delivered with default keywords that can be leveraged in the "Search/Filter" field to enable Specialty or System driven calculator searching. The following calculator keywords are delivered by default for the Crohn's Activity Index calculator:


  • Endocrinology
  • Family Practice
  • Gastroenterology
  • Internal Medicine


  • Digestive

Calculator Configuration Options

Preference Name Valid Range Description
Publishing Checked / Unchecked When checked the calculator will display for users on the front end.
When unchecked, the calculator WILL NOT display for users on the front end.
Orderable Item Override (BLANK) / G-CROHNS “(BLANK)” indicates that the global configuration options for Orderable Item will be used.
“G-CROHNS” indicates that the calculator specific value will be used and can display the specific calculator name in the output.

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