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Objetivo: Avaliar a reprodutibilidade intra e inter observadores da Classificação Tomográfica de Sanders das fraturas do calcâneo entre observadores mais e menos experientes em cirurgia do pé e tornozelo.Métodos: Foram avaliadas imagens tomográficas de 46 pacientes com diagnóstico de fratura do calcâneo. Quatro observadores, dois com dez anos de experiência em cirurgia do pé e tornozelo e dois residentes do terceiro ano em Ortopedia e Traumatologia classificaram as fraturas independentemente. Após três semanas, os mesmos observadores classificaram as fraturas apresentadas em ordem alterada aleatoriamente.A concordância intra e inter observadores foi analisada através do índice Kappa. Resultados: Houve boa concordância intra observador para os dois observadores mais experientes e um observador menos experiente (valores de Kappa 0,640; 0,632 e 0,629, respectivamente). Quando analisada a concordância inter observador, houve concordância fraca entre os mais experientes (Kappa = 0,289) e moderada entreos menos experientes (Kappa = 0,527). Conclusões: A Classificação Tomográfica de Sanders apresentou boa concordância intra observador,porém reprodutibilidade inter observadores abaixo da ideal, tanto entre observadores mais experientes quanto aqueles menos experientes.Nível de Evidência III, Estudos Diagnósticos.

Objective: To assess intra- and interobserver reproducibilityof Sanders Classification System of calcaneal fracturesamong experienced and less experienced observers. Methods:Forty-six CT scans of intra-articular calcaneal fractureswere reviewed. Four observers, two with ten years ofexperience in foot and ankle surgery and two third-year residentsin Orthopedics and Traumatology classified the fractureson two separate occasions three weeks apart from eachother. The intra and inter-observer reliability was analyzedusing the Kappa index. Results: There was good intraobserverreliability for the two experienced observers and oneless experienced observer (Kappa values 0.640, 0.632 and0.629, respectively). The interobserver reliability was fairbetween the experienced observers (Kappa = 0.289) andmoderate among the less experienced observers (Kappa= 0.527). Conclusions: The Sanders Classification Systemshowed good intraobserver reliability, but interobserver reproducibilitybelow the ideal level, both among experiencedand less experienced observers. Level of Evidence III,Diagnostic Studies.

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OBJECTIVE: : To assess intra- and interobserver reproducibility of Sanders Classification System of calcaneal fractures among experienced and less experienced observers. METHODS: : Forty-six CT scans of intra-articular calcaneal fractures were reviewed. Four observers, two with ten years of experience in foot and ankle surgery and two third-year residents in Orthopedics and Traumatology classified the fractures on two separate occasions three weeks apart from each other. The intra and inter-observer reliability was analyzed using the Kappa index. RESULTS: : There was good intraobserver reliability for the two experienced observers and one less experienced observer (Kappa values 0.640, 0.632 and 0.629, respectively). The interobserver reliability was fair between the experienced observers (Kappa = 0.289) and moderate among the less experienced observers (Kappa = 0.527). CONCLUSIONS: : The Sanders Classification System showed good intraobserver reliability, but interobserver reproducibility below the ideal level, both among experienced and less experienced observers. Level of Evidence III, Diagnostic Studies.