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Interobserver and Intraobserver Variability of Four Suprascapular Notch Classification Systems.
Christos Yiannakopoulos1,2, Elina Gianzina2, Spilios Dellis2
1Orthopaedics, IASO Hospital, Athens, GRC.
Cureus
|March 20, 2024
Summary
Four suprascapular notch classification systems show high reliability for diagnosing nerve compression, irrespective of surgeon experience. This aids in evaluating shoulder computed tomography (CT) scans for suprascapular nerve palsy.
Area of Science:
- Orthopaedic Surgery
- Radiology
- Anatomy
Background:
- Suprascapular notch morphology is crucial for diagnosing suprascapular nerve compression or palsy.
- Existing classification systems for suprascapular notch variations require reliability assessment.
- Shoulder computed tomography (CT) scans are key for morphological evaluation.
Purpose of the Study:
- To evaluate the inter- and intraobserver reliability of four suprascapular notch classification systems.
- To assess the impact of rater experience on the reliability of these classifications.
- To analyze shoulder CT scans for suprascapular notch typing.
Main Methods:
- Three orthopaedic surgeons (junior, experienced, senior) evaluated 109 shoulder CT scans.
- Suprascapular notch classification was performed using four systems at two timepoints.
- Kappa statistics (Cohen's and Fleiss) were used to assess inter- and intraobserver reliability.
Main Results:
- Almost perfect agreement was observed for all classification systems across all raters.
- No significant differences in evaluation were found between raters of varying experience levels.
- Overall interobserver agreement was consistently high for all classifications.
Conclusions:
- The four evaluated suprascapular notch classification systems demonstrate high reliability.
- Surgeon experience level does not significantly impact the reliability of suprascapular notch classification.
- These reliable systems can aid in the clinical assessment of suprascapular nerve conditions.
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