• World Neurosurg · Jul 2014

    Comparative Study

    Minimally invasive versus open transforaminal lumbar interbody fusion for degenerative spondylolisthesis: comparative effectiveness and cost-utility analysis.

    • Scott L Parker, Stephen K Mendenhall, David N Shau, Scott L Zuckerman, Saniya S Godil, Joseph S Cheng, and Matthew J McGirt.
    • Department of Neurosurgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA; Vanderbilt Spinal Column Surgical Quality and Outcomes Research Laboratory, Nashville, Tennessee, USA.
    • World Neurosurg. 2014 Jul 1;82(1-2):230-8.

    BackgroundMinimally invasive transforaminal lumbar interbody fusion (MIS TLIF) for lumbar spondylolisthesis allows for the surgical treatment of back/leg pain while minimizing tissue injury and accelerating the patient's recovery. Although previous results have shown shorter hospital stays and decreased intraoperative blood loss for MIS versus open TLIF, short- and long-term outcomes have been similar. Therefore, we performed comparative effectiveness and cost-utility analysis for MIS versus open TLIF.MethodsA total of 100 patients (50 MIS, 50 open) undergoing TLIF for lumbar spondylolisthesis were prospectively studied. Back-related medical resource use, missed work, and quality-adjusted life years were assessed. Cost of in-patient care, direct cost (2-year resource use × unit costs based on Medicare national allowable payment amounts), and indirect cost (work-day losses × self-reported gross-of-tax wage rate) were recorded, and the incremental cost-effectiveness ratio was calculated.ResultsLength of hospitalization and time to return to work were less for MIS versus open TLIF (P = 0.006 and P = 0.03, respectively). MIS versus open TLIF demonstrated similar improvement in patient-reported outcomes assessed. MIS versus open TLIF was associated with a reduction in mean hospital cost of $1758, indirect cost of $8474, and total 2-year societal cost of $9295 (P = 0.03) but similar 2-year direct health care cost and quality-adjusted life years gained.ConclusionsMIS TLIF resulted in reduced operative blood loss, hospital stay and 2-year cost, and accelerated return to work. Surgical morbidity, hospital readmission, and short- and long-term clinical effectiveness were similar between MIS and open TLIF. MIS TLIF may represent a valuable and cost-saving advancement from a societal and hospital perspective.Copyright © 2014 Elsevier Inc. All rights reserved.

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