Development of a scoring system to assist clinicians in the early referral of patients with suspected juvenile idiopathic arthritis: the EasyJIA score
Authors' conclusion
This study presents and initially validates a simple and efficient scoring system to aid clinicians in the early referral of patients suspected of having non-systemic JIA.
Study context
- Population
- Consecutive patients with joint complaints referred for the first time to the Pediatric Rheumatology Unit, ASST G. Pini-CTO Hospital61 (18%) diagnosed with juvenile idiopathic arthritis (JIA)
- Participants
- 342 patients
- Outcome
- Diagnostic performance of the scoring system for non-systemic JIA
Methodological detailsdevelopment and internal validation of a diagnostic scoring system, mixed design (retrospective and prospective), consecutive patients, multivariate logistic regression with bootstrap resampling, Lasso variable selection
- Development and internal validation of a diagnostic scoring system
- Mixed design (retrospective and prospective)
- Consecutive patients
- Multivariate logistic regression with bootstrap resampling
- Lasso variable selection
Main finding
As reported in the abstract
Identification of non-systemic JIA (ROC of the model's regression score)
| Group | AUC | Overall accuracy | Sensitivity | Specificity |
|---|---|---|---|---|
| Model | 0.92 | 0.88 | 95% | 71% |
Model
AUC0.92
Overall accuracy0.88
Sensitivity95%
Specificity71%
Observational data: associations, not effects.
Further findings
| Outcome | Values |
|---|---|
| Initial internal validation | Model AUC 0.92 |
Original publication
Development of a scoring system to assist clinicians in the early referral of patients with suspected juvenile idiopathic arthritis: the EasyJIA score. Arthritis Res Ther. Published 9 January 2026. doi:10.
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