Development and Validation of the OMERACT Juvenile Idiopathic Arthritis MRI- Sacroiliac Joint Score (OMERACT JAMRIS-SIJ): Phase 3
Objective The OMERACT JAMRIS working group has defined a spectrum of MRI lesions in the sacroiliac joint (SIJ) in pediatric cases with spondyloarthritis (SpA) that match domains for inflammation and structural damage. We aimed to assess longitudinal construct validity using two…