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Independent Reliability Analysis of a New Classification for Pyogenic Spondylodiscitis
Gaston Camino Willhuber1,2, Alfredo Guiroy2,3, Juan Zamorano2,4
137533Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.
Study Design:
Diagnostic study, level of evidence III.
Objective:
Pyogenic spondylodiscitis can cause deformity, neurological compromise, disability, and death. Recently, a new classification of spondylodiscitis based on magnetic resonance imaging was published. The objective of this study is to perform an independent reliability analysis of this new classification.
Methods:
We selected 35 cases from our database of different spine centers in Latin America and from the literature; 8 observers evaluated the classification and graded the scenarios according to the methodological grading of the classification developed by Pola et al. Cases were sent to the observers in a random sequence after 3 weeks to assess intraobserver reliability. The interobserver and intraobserver reliabilities were performed with Fleiss and Cohen statistics, respectively.
Results:
The overall Fleiss κ value for interobserver agreement was substantial, with 0.67 (95% CI = 0.43-0.91) in the first reading and 0.67 (95% CI = 0.45-0.89) in second reading for the main types of classification. The Cohen κ value for intraobserver agreement was also substantial, with 0.68 (95% CI = 0.45-0.92). The interobserver agreement analysis for the subtypes of this classification was overall substantial, with 0.60 (95% CI = 0.37-0.83) in the first reading and 0.61 (95% CI = 0.41-0.81) in the second reading. The overall intraobserver agreement for subtypes of the classification was also substantial, with 0.63 (95% CI = 0.34-0.93).
Conclusion:
The new classification developed by Pola et al showed substantial interobserver and intraobserver agreements. More studies are required to validate the usefulness of this classification especially in clinical practice.
Insights
This study found the new Pola et al. classification for pyogenic spondylodiscitis has substantial interobserver and intraobserver agreement. Further research is needed to confirm its clinical utility.
Area of Science:
- Radiology
- Orthopedic Surgery
- Infectious Diseases
Background:
- Pyogenic spondylodiscitis poses significant risks, including deformity and mortality.
- A novel magnetic resonance imaging (MRI)-based classification for spondylodiscitis has been proposed.
- Reliability of new diagnostic classifications is crucial for clinical adoption.
Purpose of the Study:
- To independently assess the reliability of the new MRI-based classification for pyogenic spondylodiscitis.
- Evaluate both interobserver and intraobserver agreement for the proposed classification system.
Main Methods:
- A diagnostic study with level of evidence III.
- 35 cases of pyogenic spondylodiscitis were reviewed by 8 independent observers.
- Interobserver reliability was assessed using Fleiss statistics, and intraobserver reliability using Cohen statistics.
Main Results:
- Substantial agreement was found for both interobserver (Fleiss κ = 0.67) and intraobserver (Cohen κ = 0.68) reliability for the main classification types.
- Interobserver agreement for subtypes was also substantial (Fleiss κ = 0.60-0.61).
- Intraobserver agreement for subtypes was substantial (Cohen κ = 0.63).
Conclusions:
- The new classification system for pyogenic spondylodiscitis demonstrates substantial interobserver and intraobserver reliability.
- Additional studies are recommended to validate the clinical usefulness of this classification.
