• Jan Hambrecht, Paul Köhli, Roland Duculan, Ranqing Lan, Erika Chiapparelli, Ali E Guven, Gisberto Evangelisti, Marco D Burkhard, Koki Tsuchiya, Jennifer Shue, Andrew A Sama, Frank P Cammisa, Federico P Girardi, Carol A Mancuso, and Alexander P Hughes.
• Department of Orthopaedic Surgery, Hospital for Special Surgery, Weill Cornell Medicine, New York City, NY, USA.
• Spine. 2024 Jun 21.

Study DesignRetrospective review of a prospective cohort study.ObjectiveTo identify the association between Oswestry Disability Index (ODI) subsections and overall improvement 2 years after lumbar surgery for degenerative lumbar spondylolisthesis (DLS).BackgroundDLS often necessitates lumbar surgery. The ODI is a trusted measure for patient-reported outcomes (PROMs) in assessing spinal disorder outcomes. Surgeons utilize the ODI for baseline functional assessment and post-surgery progress tracking. However, it remains uncertain if and how each subsection influences overall ODI improvement.MethodsThis retrospective cohort study analyzed patients who underwent lumbar surgery for DLS between 2016 and 2018. Preoperative and 2-year postoperative ODI assessments were conducted. The study analyzed postoperative subsection scores and defined ODI improvement as ODIpreop-ODIpostop >0. Univariate linear regression was applied, and receiver operating characteristic (ROC) analysis determined cut-offs for subsection changes and postoperative target values to achieve overall ODI improvement.Results265 patients (60% female, mean age 67±8 y) with a baseline ODI of 50±6 and a postoperative ODI of 20±7 were included. ODI improvement was noted in 91% (242 patients). Achieving a postoperative target score of ≤2 in subsections correlated with overall ODI improvement. Walking had the highest predictive value for overall ODI improvement (AUC 0.91, sensitivity 79%, specificity 91%). Pain intensity (AUC 0.90, sensitivity 86%, specificity 83%) and changing degree of pain (AUC 0.87, sensitivity 86%, specificity 74%) were also highly predictive. Sleeping had the lowest predictability (AUC 0.79, sensitivity 84%, specificity 65%). Except for sleeping, all subsections had a Youden-index >50%.ConclusionThese findings demonstrate how the different ODI subsections associate with overall improvement post-lumbar surgery for DLS. This understanding is crucial for refining preoperative education, addressing particular disabilities, and evaluating surgical efficacy. Additionally, it shows that surgical treatment does not affect all subsections equally.Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.

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