Assessing the Reliability of the OMERACT Juvenile Idiopathic Arthritis Magnetic Resonance Scoring System for Temporomandibular Joints (JAMRIS-TMJ)

Contrast-enhanced magnetic resonance imaging (MRI) remains the most comprehensive modality to assess juvenile idiopathic arthritis (JIA)-related inflammation and osteochondral damage in temporomandibular joints (TMJ). This study tested reliability of a new JIA MRI scoring system for TMJ (JAMRIS-TMJ) impact variations calibration reader specialty. Thirty-one exams bilateral TMJs were scored independently using JAMRIS-TMJ by 20 readers consisting radiologists non-radiologist clinicians three reading groups, with or without calibrating atlas and/or tutorial. The inter-reader multidisciplinary cohort assessed generalizability coefficient was 0.61–0.67 inflammatory 0.66–0.74 domain. tutorial did not improve agreement within radiologists, but improved between radiologist groups. Agreements different levels 0.02 0.08 lower compared levels; specialty groups 0.04 0.10 than Averaging two raised above 0.8 both domains. Therefore, moderate-to-good depending on presence differences. are necessary when consists multiple specialties.