CDAI Calculator

Crohn's Disease Activity Index - assess disease severity and treatment response

CDAI Assessment

Patient Demographics

kg
kg
%
Normal: 36-44%

Clinical Parameters (Past 7 Days)

Total liquid stools in past week
Average pain intensity scale
Overall feeling of wellness
Use of loperamide, diphenoxylate, etc.
Palpable abdominal mass on examination

Complications (Check all that apply)

Each complication adds 20 points

CDAI Score Results

0
CDAI Score
Range: 0-600+
Remission
Crohn's disease in remission
Inactive

Clinical Interpretations:

  • Patient is in clinical remission with minimal symptoms
  • Focus on maintenance therapy and lifestyle management
  • Regular monitoring to detect early signs of flare

Medical Disclaimer

This CDAI calculator is for educational purposes only and should not replace clinical judgment. CDAI scores should be calculated individually by a qualified gastroenterologist. Always consult with healthcare professionals for proper Crohn's disease diagnosis, management, and treatment decisions. The assessment requires comprehensive clinical evaluation and patient history.

CDAI Interpretation

<150
Remission
Inactive
150-450
Active
Mild-Moderate
>450
Severe
Intensive Care

Treatment Response: Decrease of >70 points indicates meaningful improvement

CDAI Components

Liquid stools
Number × 2
Abdominal pain
Scale 0-3 × 5
General well-being
Scale 0-4 × 7
Complications
Count × 20

Clinical Applications

📊

Assess disease severity and activity

💊

Monitor treatment response

🎯

Define clinical remission

📋

Research and clinical trials

⚕️

Quality of life assessment

Understanding Crohn's Disease and CDAI

What is Crohn's Disease?

Crohn's disease is a lifelong inflammatory bowel disease that can affect any segment of the gastrointestinal tract from mouth to anus. It is characterized by chronic inflammation, causing various symptoms and complications that significantly impact quality of life.

Common Symptoms

  • Abdominal Pain: Cramping and discomfort
  • Diarrhea: Frequent, sometimes bloody stools
  • Weight Loss: Due to malabsorption and reduced intake
  • Fatigue: From chronic inflammation and anemia

CDAI Development and Use

Historical Background
Developed in 1976 by experts from the Midwest Regional Health Center in Illinois. It remains the gold standard for assessing Crohn's disease activity in clinical practice and research.
Clinical Applications
Treatment Monitoring: Track response to medications
Clinical Trials: Standardized endpoint measurement
Disease Management: Objective assessment of activity
Quality of Life: Comprehensive symptom evaluation

Important Clinical Notes

Remission Definition: CDAI <150 indicates clinical remission and is the target for treatment.

Treatment Response: A reduction of ≥70 points from baseline indicates clinically meaningful improvement.

Severe Disease: CDAI >450 indicates severe activity requiring intensive management.

Limitations: CDAI doesn't assess endoscopic healing or histological improvement.

Complementary Assessments: Should be used alongside endoscopic findings and biomarkers.