An independent inter- and intra-observer agreement assessment of the Eno classification of sacroiliac joint degeneration

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dc.contributor.authorUrrutia, Julio
dc.contributor.authorCamino-Willhuber, Gaston
dc.contributor.authorAstur, Nelson
dc.contributor.authorValacco, Marcelo
dc.contributor.authorBorensztein, Matias
dc.contributor.authorVelan, Osvaldo
dc.contributor.authorCikutovic, Pablo
dc.date.accessioned2025-01-20T22:01:57Z
dc.date.available2025-01-20T22:01:57Z
dc.date.issued2022
dc.description.abstractBackground Recently, a scoring system to grade sacroiliac joint (SIJ) degeneration using computed tomography (CT) scans was described. No independent evaluation has determined the inter- and intra-observer agreement using this scheme. Purpose To perform an independent inter- and intra-observer agreement assessment using the Eno classification and determining gas in the SIJ. Material and Methods We studied 64 patients aged >= 60 years who were evaluated with abdominal and pelvic computed tomography scans. Six physicians (three orthopaedic spine surgeons and three musculoskeletal radiologists) assessed axial images to grade SIJ degeneration into grade 0 (normal), grade 1 (mild degeneration), grade 2 (significant degeneration), and grade 3 (ankylosis). We also evaluated the agreement assessing the presence of gas in the SIJ. After a four-week interval, all cases were presented in a random sequence for repeat assessment. We determined the agreement using the kappa (kappa) or weighted kappa coefficient (w kappa). Results The inter-observer agreement was moderate (w kappa = 0.50 [0.44-0.56]), without differences among surgeons (w kappa = 0.53 [0.45-0.61]) and radiologists (w kappa = 0.49 [0.42-0.57]). The agreement evaluating the presence of gas was also moderate (kappa = 0.45 [0.35-0.54]), but radiologists obtained better agreement (kappa = 0.61 [0.48-0.72]) than surgeons (kappa = 0.29 [0.18-0.39]). The intra-observer agreement using the classification was substantial (w kappa = 0.79 [0.76-0.82]), without differences comparing surgeons (w kappa = 0.75 [0.70-0.80]) and radiologists (w kappa = 0.83 [0.79-0.87]). The intra-rater agreement evaluating gas was substantial (kappa = 0.77 [0.72-0.82]), without differences between surgeons (kappa = 0.71 [0.63-0.78]) and radiologists (kappa = 0.84 [0.78-0.90]). Conclusion Given the only moderate agreement obtained using the Eno classification, it does not seem adequate to be used in clinical practice or in research.
dc.fuente.origenWOS
dc.identifier.doi10.1177/02841851211029082
dc.identifier.eissn1600-0455
dc.identifier.issn0284-1851
dc.identifier.urihttps://doi.org/10.1177/02841851211029082
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93911
dc.identifier.wosidWOS:000683534600001
dc.issue.numero8
dc.language.isoen
dc.pagina.final1076
dc.pagina.inicio1071
dc.revistaActa radiologica
dc.rightsacceso restringido
dc.subjectSacroiliac joint
dc.subjectjoint degeneration
dc.subjectagreement study
dc.subjectintra-articular gas
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleAn independent inter- and intra-observer agreement assessment of the Eno classification of sacroiliac joint degeneration
dc.typeartículo
dc.volumen63
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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