Feasibility and reliability of the Spondyloarthritis Research Consortium of Canada sacroiliac joint inflammation score in children

Published methods for quantification of magnetic resonance imaging (MRI) evidence of inflammation in the sacroiliac joint lack validation in pediatric populations. We evaluated the reliability and construct validity of the Spondyloarthritis Research Consortium of Canada (SPARCC) sacroiliac joint inf...

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Bibliographic Details
Published in:Arthritis research & therapy 2018-03, Vol.20 (1), p.56-56, Article 56
Main Authors: Weiss, Pamela F, Maksymowych, Walter P, Lambert, Robert G, Jaremko, Jacob L, Biko, David M, Paschke, Joel, Brandon, Timothy G, Xiao, Rui, Chauvin, Nancy A
Format: Article
Language:English
Subjects:
Ankylosing spondylitis
Diagnosis
Evaluation
Imaging
Juvenile idiopathic arthritis
Medical tests
Outcomes
Pediatric diseases
Spondyloarthritis
Spondyloarthropathies
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Summary:Published methods for quantification of magnetic resonance imaging (MRI) evidence of inflammation in the sacroiliac joint lack validation in pediatric populations. We evaluated the reliability and construct validity of the Spondyloarthritis Research Consortium of Canada (SPARCC) sacroiliac joint inflammation score (SIS) in children with suspected or confirmed juvenile spondyloarthritis (JSpA). The SPARCC SIS measures the presence, depth, and intensity of bone marrow inflammation on MRI through the cartilaginous part of the joint. Six readers blinded to clinical details except age, participated in two reading exercises, each preceded by a calibration exercise. Inter-observer reliability was assessed using intraclass correlation coefficients (ICCs) and for pre-specified acceptable reliability the inraclass correlation coefficient (ICC) was > 0.8. The SPARCC SIS had face validity and was feasible to score in pediatric cases in both reading exercises. Cases were mostly male (64%) and the median age at the time of imaging was 14.9 years. After calibration, the median ICC across all readers for the SIS total score was 0.81 (IQR 0.71-0.89). SPARCC SIS had weak correlation with disease activity (DA) as measured by the JSpADA (r = - 0.12) but discriminated significantly between those with and without elevated C-reactive protein (p = 0.03). The SPARCC SIS was feasible to score and had acceptable reliability in children. The ICC improved with additional calibration and reading exercises, for both experienced and inexperienced readers.
ISSN:1478-6362
1478-6354
1478-6362
DOI:10.1186/s13075-018-1543-x