• Lumbar Spine
    • Lumbar Spine: Reliability...
    • Lumbar Spine: Reliability of MR Imaging Findings1: Influence Statistics

      Expert Impact

      Concepts for whichthey havehas direct influence:Lumbar spine,Disk degeneration,Facet arthropathy,Intraobserver agreement,Interobserver agreement,Magnetic resonance,Kappa values,Intervertebral disc.

      Key People For Lumbar Spine

      Top KOLs in the world
      Harry K Genant
      vertebral fractures rheumatoid arthritis postmenopausal women
      Manohar M Panjabi
      cervical spine neutral zone lateral bending
      Lee Joseph Melton,
      olmsted county fracture risk irritable bowel syndrome
      John A Kanis
      hip fracture postmenopausal women intervention thresholds
      Steven Ron Cummings
      hip fracture breast cancer older women
      Jane A Cauley
      hip fracture older women breast cancer

      Lumbar Spine: Reliability of MR Imaging Findings1


      PURPOSE: To characterize the inter- and intraobserver variability of qualitative, non-disk contour degenerative findings of the lumbar spine at magnetic resonance (MR) imaging.

      MATERIALS AND METHODS: The case accrual method used to perform this institutional review board-approved, HIPAA-compliant retrospective study was the random selection of 111 interpretable MR examination cases of subjects from the Spine Patient Outcomes Research Trial. The subjects were aged 18-87 years (mean, 53 years +/- 16 [standard deviation]). Four independent readers rated the cases according to defined criteria. A subsample of 40 MR examination cases was selected for reevaluation at least 1 month later. The following findings were assessed: spondylolisthesis, disk degeneration, marrow endplate abnormality (Modic changes), posterior anular hyperintense zone (HIZ), and facet arthropathy. Inter- and intraobserver agreement in rating the data was summarized by using weighted kappa statistics.

      RESULTS: Interobserver agreement was good (kappa = 0.66) in rating disk degeneration and moderate in rating spondylolisthesis (kappa = 0.55), Modic changes (kappa = 0.59), facet arthropathy (kappa = 0.54), and posterior HIZ (kappa = 0.44). Interobserver agreement in rating the extent of Modic changes was moderate: kappa Values were 0.43 for determining superior anteroposterior extent, 0.47 for determining superior craniocaudal extent, 0.57 for determining inferior anteroposterior extent, and 0.48 for determining inferior craniocaudal extent. Intraobserver agreement was good in rating spondylolisthesis (kappa = 0.66), disk degeneration (kappa = 0.74), Modic changes (kappa = 0.64), facet arthropathy (kappa = 0.69), and posterior HIZ (kappa = 0.67). Intraobserver agreement in rating the extent of Modic changes was moderate, with kappa values of 0.54 for superior anteroposterior, 0.60 for inferior anteroposterior, 0.50 for superior craniocaudal, and 0.60 for inferior craniocaudal extent determinations.

      CONCLUSION: The interpretation of general lumbar spine MR characteristics has sufficient reliability to warrant the further evaluation of these features as potential prognostic indicators.

      Sign-in to see all concepts, it's free!


    Download on the App StoreGet it on Google Play

    Copyright © 2023 Key Opinion Leaders, LLC.