Análise da confiabilidade de métodos radiográficos para avaliação da artrodese posterolateral lombossacra Reliability analysis of radiographic methods for determination of posterolateral lumbossacral fusion

ABSTRACT Objective: To analyze intra and interobserver agreement of two radiographic methods for evaluation of posterolateral lumbar arthrodesis. Methods : Twenty patients undergoing instrumented posterolateral fusion were evaluated by anteroposterior and dynamic lateral 1 Santa Casa da Misericordia de Santos, Santos, SP, Brasil. 2 Faculdade de Medicina do ABC, Santo Andre, SP, Brasil. 3 Universidade Federal de Sao Paulo, Santos, SP, Brasil.Autor correspondente: Alberto Ofenhejm Gotfryd – Santa Casa da Misericordia de Santos, Departamento de Ortopedia e Traumatologia, Avenida Dr. Claudio Luis da Costa, 50 – Jabaquara – CEP: 11075-900 Santos, SP, Brasil – E-mail: albertocoluna@yahoo.com.brData de submissao: 27/8/2013 – Data de aceite: 27/12/2013Conflito de interesse: nao ha.DOI: 10.1590/S1679-45082014AO2964 radiographs in maximal flexion and extension. The images were evaluated initially by 6 orthopedic surgeons, and after 8 weeks, reassessed by 4 of them, totaling 400 radiographic measurements. Intra and interobserver reliability were analyzed using the Kappa coefficient and Landis and Koch criteria.