Disk Area Is a More Reliable Measurement Than Anteroposterior Length in the Assessment of Lumbar Disk Herniations: A Validation Study.

Clinical Spine Surgery : a Spine Publication
Anmol GuptaStuart Hershman

Abstract

Retrospective study. The goal of this study is to identify and validate the reliability and accuracy of 2 methods used to assess lumbar disk herniations (LDHs): anteroposterior length and cross-sectional area. Many clinicians characterize LDHs through the measurement of the anteroposterior length in the axial plane. Radiologists, on the other hand, have utilized software to measure the disk and canal areas to define the injury. In this study, the authors consider the reliability and accuracy of anteroposterior length in comparison with the area. Using International Classification of Diseases, 10th Revision (ICD-10) code M51.26, patients at a single academic medical center who received a diagnosis of primary lumbar radicular pain with subsequent magnetic resonance imaging documentation of a single-level disk herniation in 2015 and 2016 were identified. AGFA-IMPACS software was utilized to make the following measurements: anterior-posterior canal length; anterior-posterior disk length; mid-canal width; mid-disk width; total canal area; total disk area. Data analysis was conducted in SPSS and a 2-tailed reliability analysis using Cronbach alpha as a measure of reliability was obtained. A total of 408 patients met the inclusion and...Continue Reading

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