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01-02-2017 | Original Article

Degenerative lumbar spinal canal stenosis: intra- and inter-reader agreement for magnetic resonance imaging parameters

Authors: Sebastian Winklhofer, Ulrike Held, Jakob M. Burgstaller, Tim Finkenstaedt, Nicolae Bolog, Nils Ulrich, Johann Steurer, Gustav Andreisek, Filippo Del Grande

Published in: European Spine Journal | Issue 2/2017

Abstract

Purpose

To assess the inter- and intra-reader agreement of commonly used quantitative and qualitative image parameters for the assessment of degenerative lumbar spinal canal stenosis (LSS) by magnetic resonance imaging (MRI).

Methods

In this ethical board approved cross-sectional multicenter study, MRI of 100 randomly selected patients (median age 72.5 years, 48 % female) of the prospective Lumbar Stenosis Outcome Study (LSOS) were evaluated by two independent readers. A set of five previously published core imaging parameters as well as nine qualitative and five quantitative additional parameters regarding LSS and degenerative changes of the lumbar spine were assessed to calculate κ and intraclass correlation coefficients (ICC) for the inter-reader agreement. Additional repeated image evaluations were performed by one reader to calculate the intra-reader agreement.

Results

κ values for the core image parameters ranged between 0.42 (compromise of the foraminal zone) and 0.77 (relation between fluid and cauda equina) for inter-reader agreement and between 0.59 (compromise of the foraminal zone) and 0.8 (compromise of the central zone) for intra-reader agreement. The inter-reader agreement for the non-core parameters showed κ values of 0.27–0.69 and ICC values of 0.46–0.85. The intra-reader agreement showed κ values of 0.53–0.69 and ICC values of 0.81–0.88.

Conclusions

The inter- and intra-reader agreement of commonly used quantitative and qualitative image parameters for the assessment of LSS showed quite a variability with previously defined core parameters having good to excellent inter- and intra-reader agreements.

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Title: Degenerative lumbar spinal canal stenosis: intra- and inter-reader agreement for magnetic resonance imaging parameters
Authors: Sebastian Winklhofer
Ulrike Held
Jakob M. Burgstaller
Tim Finkenstaedt
Nicolae Bolog
Nils Ulrich
Johann Steurer
Gustav Andreisek
Filippo Del Grande
Publication date: 01-02-2017
Publisher: Springer Berlin Heidelberg
Published in: European Spine Journal / Issue 2/2017
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI: https://doi.org/10.1007/s00586-016-4667-1

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Degenerative lumbar spinal canal stenosis: intra- and inter-reader agreement for magnetic resonance imaging parameters

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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