{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,10]],"date-time":"2026-11-10T15:28:14Z","timestamp":1794324494404,"version":"4.9.0"},"reference-count":43,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,5,29]]},"abstract":"<jats:sec>\n                    <jats:title>OBJECTIVE<\/jats:title>\n                    <jats:p>The aim of this study was to compare patient-reported outcome measures among patients with degenerative lumbar spondylolisthesis (DLS) who underwent either decompression alone (DA) or decompression and fusion (DF) stratified by preoperative lumbar lordosis distribution index (LDI).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS<\/jats:title>\n                    <jats:p>Patients with DLS from 2 of the 7 centers enrolled in the Canadian Spine Outcomes and Research Network prospective study between 2015 and 2022 were retrospectively analyzed. Patients were stratified into an LDI &lt; 50% and an LDI 50%\u201380% cohort, and whether they underwent DF or DA. Radiographic parameters were obtained from preoperative radiographs and included global lumbar lordosis, lower lumbar lordosis, and the LDI. The primary outcomes included achieving the minimal clinically important difference (MCID) for the numeric rating scale (NRS) score for back pain, the NRS score for leg pain, and the Oswestry Disability Index (ODI) at 24 months postoperatively.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS<\/jats:title>\n                    <jats:p>One hundred seventy-nine patients were available for analysis. There were 73 patients with a preoperative LDI &lt; 50% (32 with DA, 41 with DF), while 106 patients had a preoperative LDI 50%\u201380% (51 with DA, 55 with DF). In the LDI &lt; 50% group, the MCID for back pain was achieved at 24 months in significantly more patients with DF than with DA (85.7% vs 48.3%, p = 0.002) and for the ODI (91.4% vs 62.1%, p = 0.006). These differences were not observed in the LDI 50%\u201380% group. After multivariate analysis, in the LDI &lt; 50% cohort DF was associated with improved odds of achieving the MCID at 24 months for back pain (OR 12.614, 95% CI 1.899\u201383.767; p = 0.009) and ODI (OR 10.479, 95% CI 1.423\u201377.156; p = 0.021) scores compared to DA. These differences were not found in the LDI 50%\u201380% cohort.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSIONS<\/jats:title>\n                    <jats:p>In patients with DLS, a preoperative LDI &lt; 50% may be helpful in identifying those who may benefit from DF over DA.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/2026.1.spine251551","type":"journal-article","created":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T00:00:53Z","timestamp":1779840053000},"page":"203-212","source":"Crossref","is-referenced-by-count":0,"title":["The association of decompression and fusion with improved patient-reported outcome measures in patients with degenerative spondylolisthesis and a hypolordotic lordosis distribution index when compared with decompression alone"],"prefix":"10.3171","volume":"45","author":[{"given":"Brandon J.","family":"Herrington","sequence":"first","affiliation":[{"name":"Combined Orthopedic and Neurosurgical Spine Program, London Health Sciences Centre, Schulich School of Medicine, Western University, London, Ontario;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jennifer C.","family":"Urquhart","sequence":"additional","affiliation":[{"name":"Combined Orthopedic and Neurosurgical Spine Program, London Health Sciences Centre, Schulich School of Medicine, Western University, London, Ontario;"},{"name":"Canadian Spine Outcomes and Research Network, Canadian Spine Society, Markdale, Ontario;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renan J.","family":"Rodrigues Fernandes","sequence":"additional","affiliation":[{"name":"Combined Orthopedic and Neurosurgical Spine Program, London Health Sciences Centre, Schulich School of Medicine, Western University, London, Ontario;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R. Andrew","family":"Glennie","sequence":"additional","affiliation":[{"name":"Department of Surgery, Division of Orthopaedics, Dalhousie University, Halifax, Nova Scotia;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charles G.","family":"Fisher","sequence":"additional","affiliation":[{"name":"Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, British Columbia;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicolas","family":"Dea","sequence":"additional","affiliation":[{"name":"Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, British Columbia;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenneth","family":"Thomas","sequence":"additional","affiliation":[{"name":"University of Calgary Spine Program, University of Calgary, Alberta;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Soroceanu","sequence":"additional","affiliation":[{"name":"University of Calgary Spine Program, University of Calgary, Alberta;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Neil","family":"Manson","sequence":"additional","affiliation":[{"name":"Canada East Spine Centre, Division of Orthopedic Surgery, Zone 2, Horizon Health Network, Saint John, New Brunswick;"},{"name":"Dalhousie University Faculty of Medicine, Halifax, Nova Scotia; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Y. Raja","family":"Rampersaud","sequence":"additional","affiliation":[{"name":"Divisions of Orthopedic Surgery and Neurosurgery, Toronto Western Hospital, University Health Network, University of Toronto, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher S.","family":"Bailey","sequence":"additional","affiliation":[{"name":"Combined Orthopedic and Neurosurgical Spine Program, London Health Sciences Centre, Schulich School of Medicine, Western University, London, Ontario;"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"6","key":"b1","series-title":"Acta Biomed","first-page":"e2021313","article-title":"Degenerative spondylolisthesis: a narrative review","volume":"92","author":"Akkawi I","year":"2022","unstructured":"Akkawi I, Zmerly H. Degenerative spondylolisthesis: a narrative review. 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