ArticleFrontiers in pediatrics2026
Development and validation of subtype-specific simplified ultrasound assessment systems for juvenile idiopathic arthritis: a prospective observational study.
Article in Frontiers in pediatrics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objectives: Comprehensive ultrasound effectively assesses synovitis in juvenile idiopathic arthritis (JIA) but is time-consuming. Existing simplified scores apply a uniform joint combination to all subtypes, overlooking the differences between the oligoarticular (oJIA) and polyarticular (pJIA) forms. We aimed to develop subtype-specific simplified ultrasound systems to improve clinical efficiency. Methods: In this prospective study, 83 patients with active oJIA ( Results: Examination time was reduced by approximately 67% (∼13 vs. 38.8 min). The oJIA model required 4 joint pairs (elbows, knees, ankles, MCP1); although its correlation with systemic activity was limited by localized disease, it showed excellent numerical agreement with the comprehensive score, supporting its use for monitoring. The pJIA model (6 joint pairs: elbows, wrists, hips, knees, PIP3, PIP5) showed superior diagnostic performance for high disease activity (AUC = 0.88) compared with the all-patient model (AUC = 0.67), and a strong correlation with JADAS27 (rs = 0.68, Conclusions: Subtype-specific simplified ultrasound systems substantially reduce examination time while maintaining accuracy. The pJIA model effectively grades disease activity, whereas the oJIA model provides a reliable, efficient tool for longitudinal monitoring. This individualized approach optimizes workflow efficiency in pediatric rheumatology.
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