billycalc

CDAI (Crohn)

CDAI (Crohn): calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.

ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.

CDAI (Crohn)

Male sex (1 = yes)
Liquid/soft stools over 7 days, number
Abdominal pain: 7-day sum (0–3 per day)
General well-being: 7-day sum (0–4 per day)
Arthritis/arthralgia (1 = yes)
Iritis/uveitis (1 = yes)
Erythema nodosum, pyoderma gangrenosum or aphthous stomatitis (1 = yes)
Anal fissure, fistula or abscess (1 = yes)
Other fistula (1 = yes)
Fever above 37.8 °C in the past week (1 = yes)
Antidiarrheal drug use (1 = yes)
Abdominal mass (0 none / 2 questionable / 5 definite)
Hematocrit%
Body weightkg
Standard (ideal) body weightkg
CDAI
217
CDAI (Crohn): calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
Crohn's disease activity
Mild
Hematocrit component
42
Body weight component
10

More about: CDAI (Crohn)

What it calculates

The “CDAI (Crohn)” calculator computes CDAI from 15 parameters: male sex (1 = yes), liquid/soft stools over 7 days, number, abdominal pain: 7-day sum (0–3 per day), general well-being: 7-day sum (0–4 per day), arthritis/arthralgia (1 = yes), iritis/uveitis (1 = yes), erythema nodosum, pyoderma gangrenosum or aphthous stomatitis (1 = yes), anal fissure, fistula or abscess (1 = yes), other fistula (1 = yes), fever above 37.8 °c in the past week (1 = yes), antidiarrheal drug use (1 = yes), abdominal mass (0 none / 2 questionable / 5 definite), hematocrit (%), body weight (kg), standard (ideal) body weight (kg).

Used by professionals and patients to assess health metrics, dosages, and risks.

Example calculation

With parameters Male sex (1 = yes) = 1, Liquid/soft stools over 7 days, number = 20, Abdominal pain: 7-day sum (0–3 per day) = 7, General well-being: 7-day sum (0–4 per day) = 10, Arthritis/arthralgia (1 = yes) = 1, Iritis/uveitis (1 = yes) = 0, Erythema nodosum, pyoderma gangrenosum or aphthous stomatitis (1 = yes) = 0, Anal fissure, fistula or abscess (1 = yes) = 0, Other fistula (1 = yes) = 0, Fever above 37.8 °C in the past week (1 = yes) = 0, Antidiarrheal drug use (1 = yes) = 0, Abdominal mass (0 none / 2 questionable / 5 definite) = 0, Hematocrit = 40 %, Body weight = 63 kg, Standard (ideal) body weight = 70 kg the result is 217.

How to use

  1. Enter male sex (1 = yes), liquid/soft stools over 7 days, number, abdominal pain: 7-day sum (0–3 per day), general well-being: 7-day sum (0–4 per day), arthritis/arthralgia (1 = yes), iritis/uveitis (1 = yes), erythema nodosum, pyoderma gangrenosum or aphthous stomatitis (1 = yes), anal fissure, fistula or abscess (1 = yes), other fistula (1 = yes), fever above 37.8 °c in the past week (1 = yes), antidiarrheal drug use (1 = yes), abdominal mass (0 none / 2 questionable / 5 definite), hematocrit, body weight and standard (ideal) body weight — each field above is adjustable with a slider.
  2. CDAI is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

Related calculators

FAQ

How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.

More calculators in this category

Explore related free tools

CHADS2ATRIA ScoreORBIT ScoreALT/AST RatioNAFLD Fibrosis ScoreBISAP ScoreAlvarado ScorePediatric Appendicitis ScoreAIR ScoreCentor ScoreMcIsaac ScorePneumonia Severity Index