Intra and Interobserver Agreement Regarding the Walch Classification System for Shoulder Joint Arthritis

Intra and Interobserver Agreement Regarding the Walch Classification System for Shoulder Joint Arthritis

Abstract Objective To evaluate the inter- and intraobserver agreement regarding the Walch classification system for shoulder arthritis. Methods Computed tomography scans of the shoulder joint of adult patients were selected between 2012 and 2016, and they were classified by physicians with different levels of expertise in orthopedics. The images were examined at three different times, and the analyses were evaluated by the Fleiss Kappa index to verify the intra- and interobserver agreement. Results The Kappa index for the intraobserver agreement ranged from 0.305 to 0.545. The inter-observer agreement was very low at the end of the three evaluations (κ = 0.132). Conclusion The intraobserver agreement regarding the modified Walch classification varied from moderate to poor. The interobserver agreement was low.

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Bibliographic Details
Main Authors: Pajolli,Lauro José Rocchetti, Carlini,Marcelo Casciato, Ferrari,Isabella, Matsunaga,Fábio Teruo, Archetti Netto,Nicola, Tamaoki,Marcel Jun Sugawara
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Ortopedia e Traumatologia 2019
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162019000600644
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Summary:Abstract Objective To evaluate the inter- and intraobserver agreement regarding the Walch classification system for shoulder arthritis. Methods Computed tomography scans of the shoulder joint of adult patients were selected between 2012 and 2016, and they were classified by physicians with different levels of expertise in orthopedics. The images were examined at three different times, and the analyses were evaluated by the Fleiss Kappa index to verify the intra- and interobserver agreement. Results The Kappa index for the intraobserver agreement ranged from 0.305 to 0.545. The inter-observer agreement was very low at the end of the three evaluations (κ = 0.132). Conclusion The intraobserver agreement regarding the modified Walch classification varied from moderate to poor. The interobserver agreement was low.

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