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Inter- and Intra-observer reliability of MRI for lumbar lateral disc herniation

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Authors
Kim, Seong Wan; Yeom, Jin S.; Park, Seong Kyu; Chang, Bong Soon; Lee, Dong-Ho; Lee, Jae Hyup; Park, Kun-Woo; Seo, Eun Seok; Lee, Choon-Ki
Issue Date
2009-03
Publisher
The Korean Orthopaedic Association
Citation
CLINICS IN ORTHOPEDIC SURGERY Vol.1 No.1, pp. 34-39
Keywords
의약학Lumbar lateral disc herniationInter-observer reliabilityIntra-observer reliabilityMagnetic resonance imaging
Abstract
Background: The authors analyzed inter- and intra-observer agreement with respect to interpretation of simple magnetic resonance T1- and T2-weighted axial and sagittal images for the diagnosis of lumbar lateral disc herniation, including foraminal and extraforaminal disc herniations.Methods: Forty-two patients in whom lumbar lateral disc herniation was suspected or confirmed by simple magnetic resonance imaging at one institute between May 2003 and December 2004 were included. The magnetic resonance images consisting of T1- and T2-weighted axial and sagittal images, and these were reviewed blindly and independently by three orthopaedic spine surgeons in a random manner. The images were interpreted as positive or negative for lateral disc herniation on 2 different occasions 3 months apart. Results were analyzed using Cohen’s kappa statistic, and strengths of agreements were determined using the Landis and Koch criteria.Results: The kappa values for inter-observer agreement averaged 0.234 (0.282, 0.111, and 0.308 respectively) on the first occasion, and 0.166 (0.249, 0.111, and 0.137 respectively) on the second occasion, with an overall mean value of 0.200. Thus, the strength of agreement was only slight-to-fair according to the Landis and Koch criteria. Kappa values for intra-observer agreement averaged 0.479 (0.488, 0.491, and 0.459 respectively), indicating moderate agreement.Conclusions: The present study indicates that simple magnetic resonance imaging is not a reliable imaging modality for diagnosing lumbar lateral disc herniation. Another imaging study with improved diagnostic values should be developed to diagnose this pathologic finding.Keywords: Lumbar lateral disc herniation, Inter-observer reliability, Intra-observer reliability, Magnetic resonance imaging
Language
English
URI
http://hdl.handle.net/10371/81638
DOI
https://doi.org/10.4055/cios.2009.1.1.34
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College of Medicine/School of Medicine (의과대학/대학원)Orthopedic Surgery (정형외과학전공)Journal Papers (저널논문_정형외과학전공)
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