Accuracy and Reliability of X-ray Measurements in the Cervical Spine
| Autor: | Anna MacDowall, Martin Skeppholm, Nuno Canto Moreira, Emma Granström, Claes Olerud, Catarina Marques |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Accuracy and precision
Intraclass correlation Radiography lcsh:Medicine Anterior cervical discectomy and fusion cervical spine Cervical sagittal vertical axis Cobb angle Cervical spine medicine Orthopedics and Sports Medicine Reliability (statistics) Alignment Orthodontics cobb angle business.industry lcsh:R alignment Repeatability cervical sagittal vertical axis Sagittal plane medicine.anatomical_structure T1 slope Clinical Study Surgery Radiologi och bildbehandling business t1 slope Radiology Nuclear Medicine and Medical Imaging |
| Zdroj: | Asian Spine Journal, Vol 14, Iss 2, Pp 169-176 (2020) Asian Spine Journal |
| ISSN: | 1976-7846 1976-1902 |
| Popis: | Study Design: This study is a post hoc analysis of a multicenter prospective randomized controlled trial which compared artificial disc replacement and anterior cervical discectomy and fusion. Purpose: Useful radiographic parameters for assessing cervical alignment include the Cobb angles, T1 slope (TS), occipitocervical inclination (OCI). K-line tilt (KLT), and cervical sagittal vertical axis (cSVA). This study aimed to determine measurement accuracy and reliability for these parameters. Overview of Literature: Various authors have assessed repeatability by comparing different methods of measurement, but knowledge of measurement error and minimal detectable change is scarce. Methods: We evaluated 75B lateral cervical radiographs. One medical student and one spine surgeon (i.e., measured x2 within 4 weeks) independently measured the parameters obtaining 5,850 values. Standard error of measurement (SEm) and minimum detectable change (MDC) were calculated for each parameter. The accuracy and reliability of the Cobb angle measurements were calculated for the different types of angles: cervical lordosis, prosthesis angle, segmental angle with two hone surfaces (SABB), and segmental angle with one bone and one metal surface. Reliability was determined with intraclass correlation coefficient (ICC). Results: SEm was 1.8 degrees and MDC was 5.0 degrees for the Cobb angle, with an intraobserver/interobserver ICC of 0.958/0.8B6. All the different subtypes of Cobb angles had an ICC higher than 0.950, except SABB (intraobserver/interobserver ICC of 0.922/0.716). The most accurate and reliable measurement was for KLT. Conclusions: This study provides normative data on SEm and MDC for Cobb angles, T1S, KLT, OCI, and cSVA in cervicalcervicai lateral radiographs. Reliability was excellent for all parameters except SABB (e.g., good). |
| Databáze: | OpenAIRE |
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