Marcio Schiefer1, Renato Mendonça2, Monica Maria Magnanini3, César Fontenelle4, Antonio Carlos Pires Carvalho5, Mariana Almeida4, Ana Cláudia Chu4, Sérgio Maurício Silva4, Filipe Visconti6, Gabriel A M Ferreira6, José Sérgio Franco6. 1. Department of Orthopaedic Surgery, Center of Shoulder and Elbow Surgery, National Institute of Trauma and Orthopaedics, Rio de Janeiro, Brazil. Electronic address: marcioschiefer@hotmail.com. 2. Department of Radiology, Hospital Barra D'Or, Rio de Janeiro, Brazil. 3. Collective Health Study Institute, Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil. 4. Department of Orthopaedics, Clementino Fraga Filho University Hospital (HUCFF), Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil. 5. Department of Radiology, Faculty of Medicine, Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil. 6. Department of Orthopaedics, Faculty of Medicine, Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil.
Abstract
BACKGROUND: Fatty infiltration of the muscle bellies is an important prognostic factor in rotator cuff tears. It was described initially in computed tomography examinations, and there is an ongoing debate about whether magnetic resonance (MR) is a reliable method for staging fatty infiltration. This study sought to determine intraobserver and interobserver agreement for Goutallier's classification of fatty infiltration of the rotator cuff as evaluated through MR imaging. MATERIALS AND METHODS: Twenty MR examinations of the shoulder showing full-thickness tear of the supraspinatus tendon, with or without associated lesions, were evaluated by 3 radiologists with experience in musculoskeletal system imaging and 3 fellowship-trained shoulder surgeons. The evaluators classified the fatty infiltration of the supraspinatus muscle according to the guidelines proposed by Goutallier et al. After 8 weeks, they re-evaluated the examinations, without access to their previous reports. Weighted κ index values were determined for intraobserver and interobserver agreement analyses, and intraobserver agreement κ values are reported with 95% confidence intervals (CIs). RESULTS: The mean intraobserver agreement was 0.832 among the orthopedists (CI > 95%) and 0.741 among the radiologists (CI > 95%). Interobserver agreement was 0.8214 (evaluation 1) and 0.7231 (evaluation 2) among the orthopedists (P < .0001) and 0.6627 (evaluation 1) and 0.6067 (evaluation 2) among the radiologists (P < .0001). Intraobserver agreement was not associated with length of experience or frequency of routine evaluations. CONCLUSIONS: When it is applied to MR images of rotator cuff musculature, Goutallier's fatty infiltration staging rubric yielded highly significant intraobserver and interobserver agreement.
BACKGROUND: Fatty infiltration of the muscle bellies is an important prognostic factor in rotator cuff tears. It was described initially in computed tomography examinations, and there is an ongoing debate about whether magnetic resonance (MR) is a reliable method for staging fatty infiltration. This study sought to determine intraobserver and interobserver agreement for Goutallier's classification of fatty infiltration of the rotator cuff as evaluated through MR imaging. MATERIALS AND METHODS: Twenty MR examinations of the shoulder showing full-thickness tear of the supraspinatus tendon, with or without associated lesions, were evaluated by 3 radiologists with experience in musculoskeletal system imaging and 3 fellowship-trained shoulder surgeons. The evaluators classified the fatty infiltration of the supraspinatus muscle according to the guidelines proposed by Goutallier et al. After 8 weeks, they re-evaluated the examinations, without access to their previous reports. Weighted κ index values were determined for intraobserver and interobserver agreement analyses, and intraobserver agreement κ values are reported with 95% confidence intervals (CIs). RESULTS: The mean intraobserver agreement was 0.832 among the orthopedists (CI > 95%) and 0.741 among the radiologists (CI > 95%). Interobserver agreement was 0.8214 (evaluation 1) and 0.7231 (evaluation 2) among the orthopedists (P < .0001) and 0.6627 (evaluation 1) and 0.6067 (evaluation 2) among the radiologists (P < .0001). Intraobserver agreement was not associated with length of experience or frequency of routine evaluations. CONCLUSIONS: When it is applied to MR images of rotator cuff musculature, Goutallier's fatty infiltration staging rubric yielded highly significant intraobserver and interobserver agreement.
Authors: Fausto Salaffi; Marina Carotti; Andrea Di Matteo; Luca Ceccarelli; Sonia Farah; Catalina Villota-Eraso; Marco Di Carlo; Andrea Giovagnoni Journal: Radiol Med Date: 2022-09-20 Impact factor: 6.313
Authors: Adam Kwapisz; Jason P Rogers; Charles A Thigpen; Ellen Shanley; Eric Newton; Kyle J Adams; Ryan Alexander; Richard J Hawkins; Michael J Kissenberth; John M Tokish; Stephan G Pill Journal: JSES Int Date: 2020-12-05
Authors: Laurent Audigé; Heiner C C Bucher; Soheila Aghlmandi; Thomas Stojanov; David Schwappach; Sabina Hunziker; Christian Candrian; Gregory Cunningham; Holger Durchholz; Karim Eid; Matthias Flury; Bernhard Jost; Alexandre Lädermann; Beat Kaspar Moor; Philipp Moroder; Claudio Rosso; Michael Schär; Markus Scheibel; Christophe Spormann; Thomas Suter; Karl Wieser; Matthias Zumstein; Andreas M Müller Journal: BMJ Open Date: 2021-04-22 Impact factor: 2.692