CDAI Calculator - Crohn's Disease Activity Index

Your details

Used to determine the hematocrit reference value (47% for males, 42% for females).
Current body weight in kilograms.
kg
Ideal body weight in kilograms (use a standard IBW formula or physician estimate).
kg
Count every liquid or soft stool over the past 7 days and enter the total.
stools
Rate abdominal pain each day on a 0-3 scale and enter the daily average over 7 days. The index uses the 7-day sum, so the calculator multiplies your average by 7 before applying the weighting factor of 5.
Rate overall well-being each day on a 0-4 scale and enter the daily average over 7 days. The index uses the 7-day sum, so the calculator multiplies your average by 7 before applying the weighting factor of 7.
Includes diphenoxylate (Lomotil), loperamide (Imodium), codeine, or other opiates taken for diarrhea.
Assessed by physical examination.
Current hematocrit percentage from a complete blood count. Reference values: 47% for males, 42% for females.
%
CDAI ScoreRemission
131

Total Crohn's Disease Activity Index score

Stool frequency component14
Abdominal pain component35
Well-being component49
Complications component0
Antidiarrheal component0
Abdominal mass component0
Hematocrit component30
Weight component2.8
Complications count0
131 points
Remission<150Mild150-220Moderate220-450Severe450+

CDAI score of 131 indicates clinical remission.

  • Hematocrit is below the reference value, contributing 30 points.
  • Current weight is below ideal, adding 2.8 points from the weight deviation component.

Next stepClinical remission is defined as CDAI below 150. Continue maintenance therapy and monitoring as directed by your gastroenterologist.

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