title: Interobserver reproducibility of radiographic evaluation of lumbar spine instability.
abstract: To measure the interobserver reproducibility of the radiographic evaluation of lumbar spine instability.
  Measurements of the dynamic radiographs of the lumbar spine in lateral view were performed, evaluating the anterior translation and the angulation among the vertebral bodies. The tests were evaluated at workstations of the organization, through the Carestream Health Vue RIS (PACS), version 11.0.12.14 Inc. 2009© system.
  Agreement in detecting cases of radiographic instability among the observers varied from 88.1 to 94.4%, and the agreement coefficients AC1 were all above 0.8, indicating excellent agreement.
  The interobserver analysis performed among orthopedic surgeons with different levels of training in dynamic radiographs of the spine obtained high reproducibility and agreement. However, some factors, such as the manual method of measurement and the presence of vertebral osteophytes, might have generated a few less accurate results in this comparative evaluation of measurements.
  Mensurar a reprodutibilidade interobservadores da avaliação radiográfica da instabilidade da coluna lombar.
  Foram realizadas mensurações das radiografias dinâmicas de coluna lombar na incidência em perfil, avaliando-se a translação anterior e a angulação entre os corpos vertebrais. Os exames foram avaliados em workstations da própria instituição, por meio do sistema Vue RIS (PACS) da Carestream Health, versão 11.0.12.14 Inc. 2009©.
  A proporção de concordância em detecção de casos de instabilidade radiográfica entre os observadores variou de 88,1 a 94,4%, e os coeficientes de concordância AC1 estiveram todos acima de 0,8, indicando concordância excelente.
  A análise interobservadores realizada entre médicos ortopedistas com diferentes níveis de treinamento em radiografias dinâmicas da coluna vertebral obteve elevada reprodutibilidade e concordância. No entanto, alguns fatores, como método manual de aferição e a presença de osteófitos vertebrais, podem ter gerado alguns resultados menos consistentes nessa avaliação comparativa de medidas.
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Saulo de Tarso de Sá Pereira
authors.initials: ST
authors.lastname: Segundo
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Edgar Santiago
authors.initials: ES
authors.lastname: Valesin
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Mario
authors.initials: M
authors.lastname: Lenza
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Durval do Carmo Barros
authors.initials: DD
authors.lastname: Santos
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Laercio Alberto
authors.initials: LA
authors.lastname: Rosemberg
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Mario
authors.initials: M
authors.lastname: Ferretti
mesh_terms: D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging*; D017116:Low Back Pain / Q000000981:diagnostic imaging; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging*; D008161:Lumbosacral Region / Q000000981:diagnostic imaging; D015588:Observer Variation; D011859:Radiography / Q000379:methods*; D015203:Reproducibility of Results