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Scapula fractures: interobserver reliability of classification and treatment
Valentin Neuhaus1, Arjan G J Bot, Thierry G Guitton
1Orthopaedic Hand Service, Massachusetts General Hospital, Boston, MA.
Journal of Orthopaedic Trauma
|May 1, 2013
Summary
The New International Classification demonstrated higher reliability for scapula fractures compared to the OTA/AO system. Further definitions are needed for body and process fractures to improve surgeon agreement on treatment.
Area of Science:
- Orthopaedic Surgery
- Traumatology
- Radiology
Background:
- Scapula fracture classification and management show significant variability.
- Standardized classification systems are crucial for consistent treatment and outcomes.
Purpose of the Study:
- To evaluate the interobserver reliability of the OTA/AO and New International Classification systems for scapula fractures.
- To assess orthopaedic surgeons' agreement on operative versus nonoperative treatment for these fractures.
Main Methods:
- A web-based reliability study involving 103 orthopaedic surgeons from multiple countries.
- Surgeons classified 35 scapula fractures using 3D CT reconstructions.
- Fleiss kappa (κ) was used to measure interobserver agreement.
Main Results:
- The New International Classification showed substantial agreement for intraarticular extension (κ = 0.79).
- Moderate agreement was found for the OTA/AO classification (κ = 0.47-0.54) and treatment recommendations (κ = 0.57).
- Body and process fractures had lower agreement than intraarticular fractures.
Conclusions:
- The New International Classification is more reliable for scapula fractures.
- Clearer definitions for body and process fractures are required to reduce classification and treatment disagreements.
