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  • Title: Interobserver agreement of Neer and AO classifications for proximal humeral fractures.
    Author: Papakonstantinou MK, Hart MJ, Farrugia R, Gabbe BJ, Kamali Moaveni A, van Bavel D, Page RS, Richardson MD.
    Journal: ANZ J Surg; 2016 Apr; 86(4):280-4. PubMed ID: 26887373.
    Abstract:
    BACKGROUND: The classification of proximal humeral fractures remains challenging. The two main classification systems used, the Neer and the AO classification, have both been shown to have less than ideal interobserver agreement. Agreement in classification is required, however, to guide fracture management. METHOD: Data from the Victorian Orthopaedic Trauma Outcomes Registry were collected and the X-rays of 104 proximal humeral fractures were reviewed by three orthopaedic consultants. They classified the fractures according to the Neer and AO classifications, as well as their simplified versions. Interobserver agreement was then assessed using kappa statistics. RESULTS: Interobserver agreement was better overall in the Neer classification, which was moderate (kappa = 0.40-0.58), than the AO classification, which was fair to moderate (kappa = 0.31-0.54). When simplified, the Neer and AO classification interobserver agreement remained similar. CONCLUSION: The classification of proximal humeral fractures with both the Neer and the AO systems remains difficult with minimal improvements seen when reducing the number of categories in each classification system. From these results, the Neer classification system would appear slightly more useful in clinical practice to guide treatment.
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