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dc.contributor.authorWerner, David Andreas Thomas
dc.contributor.authorGrotle, Margreth
dc.contributor.authorSmåstuen, Milada Cvancarova
dc.contributor.authorGulati, Sasha
dc.contributor.authorNygaard, Øystein Petter
dc.contributor.authorSalvesen, Øyvind
dc.contributor.authorIngebrigtsen, Tor
dc.contributor.authorSolberg, Tore
dc.date.accessioned2021-10-21T08:05:20Z
dc.date.available2021-10-21T08:05:20Z
dc.date.issued2021-07-10
dc.description.abstract<i>Objective</i> - To develop a prognostic model for failure and worsening 1 year after surgery for lumbar disc herniation.<br><br> <i>Methods</i> - This multicenter cohort study included 11,081 patients operated with lumbar microdiscectomy, registered at the Norwegian Registry for Spine Surgery. Follow-up was 1 year. Uni- and multivariate logistic regression analyses were used to assess potential prognostic factors for previously defined cut-offs for failure and worsening on the Oswestry Disability Index scores 12 months after surgery. Since the cut-offs for failure and worsening are different for patients with low, moderate, and high baseline ODI scores, the multivariate analyses were run separately for these subgroups. Data were split into a training (70%) and a validation set (30%). The model was developed in the training set and tested in the validation set. A prediction (%) of an outcome was calculated for each patient in a risk matrix.<br><br> <i>Results</i> - The prognostic model produced six risk matrices based on three baseline ODI ranges (low, medium, and high) and two outcomes (failure and worsening), each containing 7 to 11 prognostic factors. Model discrimination and calibration were acceptable. The estimated preoperative probabilities ranged from 3 to 94% for failure and from 1 to 72% for worsening in our validation cohort.<br><br> <i>Conclusion</i> - We developed a prognostic model for failure and worsening 12 months after surgery for lumbar disc herniation. The model showed acceptable calibration and discrimination, and could be useful in assisting physicians and patients in clinical decision-making process prior to surgery.en_US
dc.identifier.citationWerner, Grotle, Småstuen, Gulati, Nygaard, Salvesen, Ingebrigtsen, Solberg. A prognostic model for failure and worsening after lumbar microdiscectomy: a multicenter study from the Norwegian Registry for Spine Surgery. Acta Neurochirurgica. 2021en_US
dc.identifier.cristinIDFRIDAID 1924427
dc.identifier.doi10.1007/s00701-021-04859-3
dc.identifier.issn0001-6268
dc.identifier.issn0942-0940
dc.identifier.urihttps://hdl.handle.net/10037/22801
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.relation.journalActa Neurochirurgica
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Medisinske Fag: 700en_US
dc.titleA prognostic model for failure and worsening after lumbar microdiscectomy: a multicenter study from the Norwegian Registry for Spine Surgeryen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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