title: [Diagnostic test scale SI5: Assessment of sacroiliac joint dysfunction].
abstract: OBJECTIVE
  Sacroiliac joint dysfunction is a known cause of low back pain. We think that a diagnostic score scale (SI5) may be performed to assess diagnostic utility of clinical signs of sacroiliac joint dysfunction. The primary aim of the present study was to conduct the pilot study of our new diagnostic score scale, the SI5, for sacroiliac joint syndrome.
  
  
  METHODS
  We reviewed the literature on clinical characteristics, diagnostic tests and imaging most commonly used in diagnosing sacroiliac joint dysfunction. Our group evaluated the diagnostic utility of these aspects and we used those considered most representative to develop the SI5 diagnostic scale. The SI5 scale was applied to 22 patients with low back pain; afterwards, the standard test for diagnosing this pathology (selective blockage of the SI joint) was also performed on these patients. The sensitivity and specificity for each sign were also assessed and the diagnostic scale called SI5 was then proposed, based on these data.
  
  
  RESULTS
  The most sensitive clinical tests for diagnosing SI joint dysfunction were 2 patient-reported clinical characteristics, the Laguerre Test, sacroiliac rocking test and Yeomans test (greater than 80% sensitivity). The tests with greatest diagnostic specificity (>80%) were the Lewitt test, Piedallu test and Gillet test. The proposed SI5 test score scale showed sensitivity of 73% and specificity of 71%.
  
  
  CONCLUSIONS
  Sacroiliac joint syndrome has been shown to produce low back pain frequently; however, the diagnostic value of examination tests for sacroiliac joint pain has been questioned by other authors. The pilot study on the SI5 diagnostic score scale showed good sensitivity and specificity. However, the process of statistical validation of the SI5 needs to be continued.
authors.affiliation: Departamento de Neurociencias, Hospital Universitario San Ignacio, Facultad de Medicina Pontificia Universidad Javeriana, Bogotá, Colombia. Electronic address: jacevedog@gmail.com.
authors.forename: Juan C
authors.initials: JC
authors.lastname: Acevedo González
authors.affiliation: Departamento de Neurociencias, Hospital Universitario San Ignacio, Facultad de Medicina Pontificia Universidad Javeriana, Bogotá, Colombia.
authors.forename: Silvia
authors.initials: S
authors.lastname: Quintero Oliveros
mesh_terms: D006801:Humans; D007592:Joint Diseases / Q000150:complications / Q000175:diagnosis*; D017116:Low Back Pain / Q000175:diagnosis* / Q000209:etiology; D010808:Physical Examination / Q000379:methods*; D012446:Sacroiliac Joint; D011795:Surveys and Questionnaires
keywords: Articulación sacroiliaca; Bloqueo sacroiliaco; Diagnostic gold standard; Diagnostic test; Disfunción de la articulación sacroiliaca; Dolor lumbar; Escala diagnóstica; Low pain back; Prueba de oro; Sacroiliac joint; Sacroiliac joint block; Sacroiliac joint dysfunction