The Simple Pediatric Activity Ultrasound Score (SPAUSS) for the Accurate Detection of Pediatric Inflammatory Bowel
Amelia Kellar1, Stephanie Wilson2,3, Gilaad Kaplan2,4
1Department of Paediatrics, Hospital for Sick Children, Toronto Ontario.
Insights
This study identified key ultrasound (US) markers, including bowel wall thickness and mesenteric fat, to predict inflammatory bowel disease (IBD) activity in children. A simple US score accurately detects inflammation, aiding noninvasive assessment.
Area of Science:
- Pediatric Gastroenterology
- Diagnostic Imaging
- Inflammatory Bowel Disease (IBD) Research
Background:
- Accurate assessment of inflammatory activity is crucial for managing pediatric inflammatory bowel disease (IBD).
- Current diagnostic methods can be invasive or lack standardization.
- Ultrasound (US) offers a noninvasive imaging modality for evaluating IBD.
Purpose of the Study:
- To identify significant ultrasound (US) parameters predicting inflammatory activity in pediatric IBD.
- To develop a simple US-based score for assessing disease activity.
Main Methods:
- Retrospective analysis of 75 children with IBD, comparing endoscopy and US findings within 60 days.
- Evaluation of US parameters: bowel wall thickness (BWT), mesenteric inflammatory fat, lymphadenopathy, and hyperemia.
- Development of a predictive score using logistic regression and assessment of its discriminative capacity via ROC curves.
Main Results:
- Substantial agreement was found between US and endoscopy for disease location (weighted kappa = 0.85).
- Bowel wall thickness (BWT) and mesenteric inflammatory fat were significant predictors of disease activity (P < 0.05).
- The developed US score demonstrated good predictive capacity (AUC = 82.1%) for distinguishing active disease from normal.
Conclusions:
- Bowel wall thickness (BWT) and mesenteric inflammatory fat are key US parameters for predicting pediatric IBD activity.
- A simple US score incorporating BWT, hyperemia, and inflammatory fat accurately detects inflammation.
- This score may enable noninvasive, standardized bedside detection of inflammation in children with IBD.
Objective:
The aim of the study was to identify the most significant ultrasound (US) parameters that predict inflammatory activity and develop a simple US activity score.
Methods:
Patients were identified through retrospective evaluation of an established database of children with inflammatory bowel disease (IBD). Patients with endoscopy and US within 60 days were included (N = 75). US parameters evaluated included: bowel wall thickness (BWT), mesenteric inflammatory fat, lymphadenopathy, and hyperemia. The weighted kappa statistic was calculated to assess agreement between sonographic and endoscopically identified disease location. Using a proportional odds model and ordinal logistic regression, statistically significant (P < 0.05) parameters were used to generate a score. Variables were weighted to classify individuals into severity classes. Receiver operating characteristic curves were plotted to demonstrate the score's discriminative and predictive capacity.
Results:
There was substantial agreement between US and endoscopy for all disease locations (weighted kappa = 0.85) and substantial agreement for ileocolonic disease (weighted kappa = 0.96). Two sonographic parameters were identified as contributing significantly to disease activity: BWT and mesenteric inflammatory fat (P < 0.05). A predictive score was developed incorporating BWT, hyperemia and inflammatory fat, and receiver operating characteristic curve curves demonstrated good predictive capacity to distinguish between the absence of disease (normal) and active disease with an area under the curve of 82.1%.
Conclusions:
The most important sonographic parameters for predicting disease activity were BWT and mesenteric inflammatory fat. When combined with hyperemia into a simple score, there was accurate detection of inflammatory activity in children with inflammatory bowel disease. This score may facilitate noninvasive, bedside detection of inflammation, and standardize the use of US in children.
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