Pediatric rheumatology

Systematic calibration reduces sources of variability for the preliminary OMERACT juvenile idiopathic arthritis MRI- sacroiliac joint score (OMERACT JAMRIS-SIJ)

Semin Arthritis RheumPublished Reliability study

Authors' conclusion

It is unlikely that contrast-enhanced MRI will improve the performance of this method.

Study context

Population
MRI SIJ scans of cases with juvenile spondyloarthritis7 raters
Participants
50 scans
Comparison
Calibrated vs uncalibrated readers; fluid-sensitive vs contrast-enhanced sequences
Outcome
Scoring proficiency (reliability) of OMERACT JAMRIS-SIJ after systematic calibration
Methodological detailsmulti-reader calibration, Calibration with 3 different knowledge transfer tools
  • Multi-reader calibration
  • Calibration with 3 different knowledge transfer tools

Main finding

As reported in the abstract

Reliability of JAMRIS-SIJ scoring after calibration
  • Calibrated readers achieved greater reliability for scoring certain inflammatory and structural lesions

Further findings

Sensitivity and reliability for scoring inflammatory lesions greater on fluid-sensitive than contrast-enhanced sequences

Original publication

Systematic calibration reduces sources of variability for the preliminary OMERACT juvenile idiopathic arthritis MRI- sacroiliac joint score (OMERACT JAMRIS-SIJ). Semin Arthritis Rheum. Published 23 November 2023. doi:10.1016/j.semarthrit.2023.152299

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