Objective: To evaluate the interobserver agreement regarding the TLICS Classification (Thoracolumbar Injury Classification and Severity Score). Furthermore, evaluate the reliability, analyzing the correlation between the treatment indicated by TLICS system (surgical or conservative) and the treatment indicated by each evaluator surgeon. Methods: Imaging tests and clinical data of 22 patients with thoracolumbar fractures were analyzed by eight spine surgeons, and two main analyzes were performed: the first compared the interobserver agreement related to TLICS and the second compared the agreement between the treatment indicated by TLICS classification (surgical or conservative) and treatment indicated by each surgeon -based on his personal experience and the preferred classification. Results: Using the parameters of Landis and Koch for interpretation of Kappa value, the interobserver agreement of TLICS classification was considered moderate in our study (K=0.6). The agreement between the indications of treatment (surgical or conservative) dictated by the classification and the indication of each surgeon was considered excellent, with kappa value of 0.89. Conclusion: We believe that the classification is a good tool for the evaluation and the treatment indication in thoracolumbar fractures.Keywords: Thoracic vertebrae; Lumbar vertebrae; Spinal fractures; Spinal cord injuries. RESUMO Objetivos: Avaliar a concordância interobservadores com relação à Classificação TLICS (Thoracolumbar Injury Classification and Severity Score). Além disso, avaliar a confiabilidade, analisando a concordância entre o tratamento indicado pelo sistema TLICS (cirúrgico ou conservador) e o tratamento que cada cirurgião avaliador indicou. Métodos: Foram avaliados retrospectivamente exames de imagem e dados clínicos de 22 pacientes com fraturas toracolombares por oito cirurgiões de coluna vertebral. Duas análises principais foram realizadas: a primeira comparando a concordância do sistema TLICS interobservadores e a segunda comparando a concordância entre o tratamento indicado por essa classificação (cirúrgico ou conservador) e o tratamento que cada cirurgião indicou -com base em sua experiência pessoal e na classificação de escolha. Resultados: Utilizando os parâmetros de Landis e Koch para interpretação do valor de Kappa, a concordância interobservadores da classificação TLICS foi considerada moderada em nosso estudo, com valor de Kappa de 0,6. A concordância entre as indicações de tratamento (cirúrgico ou conservador) ditadas pela classificação e as indicações de cada cirurgião foi considerada excelente, com valor de
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