{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T06:23:52Z","timestamp":1790231032076,"version":"4.1.0"},"reference-count":24,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["SPI"],"published-print":{"date-parts":[[2017,4]]},"abstract":"<jats:sec>\n<jats:title>OBJECTIVE<\/jats:title>\n<jats:p>The object of this study was to determine the association between postoperative sagittal spinopelvic alignment and patient-rated outcome measures following decompression and fusion for lumbar degenerative spondylolisthesis.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>METHODS<\/jats:title>\n<jats:p>The authors identified a consecutive series of patients who had undergone surgery for lumbar degenerative spondylolisthesis between 2008 and 2012, with an average follow-up of 3 years (range 1\u20136 years). Surgery was performed to address the clinical symptoms of spinal stenosis, not global sagittal alignment. Sagittal alignment was only assessed postoperatively. Patients were divided into 2 groups based on a postoperative sagittal vertical axis (SVA) &lt; 50 mm (well aligned) or \u2265 50 mm (poorly aligned). Baseline demographic, procedure, and outcome measures were compared between the groups. Postoperative outcome measures and postoperative spinopelvic parameters were compared between groups using analysis of covariance.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>RESULTS<\/jats:title>\n<jats:p>Of the 84 patients included in this study, 46.4% had an SVA &lt; 50 mm. Multiple levels of spondylolisthesis (p = 0.044), spondylolisthesis at the L3\u20134 level (p = 0.046), and multiple levels treated with fusion (p = 0.028) were more common among patients in the group with an SVA \u2265 50 mm. Patients with an SVA \u2265 50 mm had a worse SF-36 physical component summary (PCS) score (p = 0.018), a worse Oswestry Disability Index (ODI; p = 0.043), and more back pain (p = 0.039) than those with an SVA &lt; 50 mm after controlling for multiple levels of spondylolisthesis and multilevel fusion. The spinopelvic parameters differing between the &lt; 50-mm and \u2265 50-mm groups included lumbar lordosis (LL; 56.4\u00b0 \u00b1 4.7\u00b0 vs 49.8\u00b0 \u00b1 4.3\u00b0, respectively, p = 0.040) and LL &lt; pelvic incidence \u00b1 9\u00b0 (51% vs 23.1%, respectively, p = 0.013) after controlling for type of surgical procedure.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>CONCLUSIONS<\/jats:title>\n<jats:p>Data in this study revealed that patient-rated outcome is influenced by the overall postoperative sagittal balance as defined by the SVA.<\/jats:p><\/jats:sec>","DOI":"10.3171\/2016.9.spine1680","type":"journal-article","created":{"date-parts":[[2017,1,20]],"date-time":"2017-01-20T15:02:24Z","timestamp":1484924544000},"page":"448-453","source":"Crossref","is-referenced-by-count":69,"title":["Influence of postoperative sagittal balance and spinopelvic parameters on the outcome of patients surgically treated for degenerative lumbar spondylolisthesis"],"prefix":"10.3171","volume":"26","author":[{"given":"Ingrid","family":"Radovanovic","sequence":"first","affiliation":[{"name":"Division of Orthopaedics, Department of Surgery, Schulich School of Medicine and Dentistry, Western University;"},{"name":"London Health Science Centre, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jennifer C.","family":"Urquhart","sequence":"additional","affiliation":[{"name":"Lawson Health Research Institute; and"},{"name":"London Health Science Centre, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Venkat","family":"Ganapathy","sequence":"additional","affiliation":[{"name":"Division of Orthopaedics, Department of Surgery, Schulich School of Medicine and Dentistry, Western University;"},{"name":"London Health Science Centre, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fawaz","family":"Siddiqi","sequence":"additional","affiliation":[{"name":"Division of Orthopaedics, Department of Surgery, Schulich School of Medicine and Dentistry, Western University;"},{"name":"Lawson Health Research Institute; and"},{"name":"London Health Science Centre, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kevin R.","family":"Gurr","sequence":"additional","affiliation":[{"name":"Division of Orthopaedics, Department of Surgery, Schulich School of Medicine and Dentistry, Western University;"},{"name":"Lawson Health Research Institute; and"},{"name":"London Health Science Centre, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stewart I.","family":"Bailey","sequence":"additional","affiliation":[{"name":"Division of Orthopaedics, Department of Surgery, Schulich School of Medicine and Dentistry, Western University;"},{"name":"Lawson Health Research Institute; and"},{"name":"London Health Science Centre, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher S.","family":"Bailey","sequence":"additional","affiliation":[{"name":"Division of Orthopaedics, Department of Surgery, Schulich School of Medicine and Dentistry, Western University;"},{"name":"Lawson Health Research Institute; and"},{"name":"London Health Science Centre, London, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1-spine1680","series-title":"J Neurosurg Spine","doi-asserted-by":"publisher","first-page":"547","DOI":"10.3171\/2012.2.SPINE11320","article-title":"Impact of spinopelvic alignment on decision making in deformity surgery in adults: a review","volume":"16","author":"Ames CP,","year":"2012","unstructured":"Ames CP, Smith JS, Scheer JK, Bess S, Bederman SS, Deviren V, : Impact of spinopelvic alignment on decision making in deformity surgery in adults: a review. 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