Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter...

Area of Science:

• Pediatric Gastroenterology
• Inflammatory Bowel Disease Research
• Clinical Assessment Tools

Background:

• Colonoscopy is the standard for assessing ulcerative colitis activity in adults but is poorly tolerated by children.
• There is a need for a noninvasive method to evaluate disease activity in pediatric ulcerative colitis.

Purpose of the Study:

• To develop and validate a noninvasive disease activity index specifically for pediatric ulcerative colitis.
• To create a reliable and responsive tool for assessing ulcerative colitis in children.

Main Methods:

• Expert consensus (Delphi group) and regression modeling were used for item selection and weighting.
• A prospective cohort of 157 pediatric patients with ulcerative colitis was used for weighting the index.
• Validation was performed on a separate cohort of 48 children, with responsiveness assessed in 75 children.

Main Results:

• The Pediatric Ulcerative Colitis Activity Index (PUCAI) was developed, comprising 11 items, with six clinical items being significant.
• The PUCAI demonstrated high correlations with established measures (Physician's Global Assessment, Mayo score, colonoscopy) and superior performance to adult noninvasive indices.
• Excellent interobserver and test-retest reliability (ICC = 0.95) and responsiveness (effect size = 1.9) were observed.

Conclusions:

• The rigorously developed PUCAI is a noninvasive, valid, highly reliable, and responsive index.
• PUCAI provides an effective tool for assessing disease activity in pediatric ulcerative colitis, improving patient tolerance.
• This index facilitates better management of ulcerative colitis in pediatric populations.