Abstract:
STUDY DESIGN:Independent retrospective review of prospectively collected data, comparative cohort study. OBJECTIVE:The objective of this study was to compare the clinical, radiographical, and cost/value of the addition of an interbody arthrodesis (IBA) to a posterolateral arthrodesis (PLA) in the surgical treatment of L4-L5 degenerative spondylolisthesis (DS). The authors hypothesized that the addition of IBA to PLA would produce added value while incurring minimal additional costs. SUMMARY OF BACKGROUND DATA:Many lumbar surgical advances have been made during the past several decades, yet there is a paucity of strong evidence-based validation, let alone comparative value analyses. The addition of an IBA to a PLA has become increasingly popular during the past 2 decades, yet the potential added value for the patient has not been carefully defined. METHODS:Patients undergoing single-level arthrodesis for L4-L5 DS performed at our institution from 2004 to 2012 were identified. Exclusion criteria included multilevel arthrodesis, spinal stenosis requiring decompression at or above L2-L3, previous L4-L5 spinal fusion, spondylolisthesis of greater than 33% of the vertebral body, and use of minimally invasive surgery. Radiographical fusion status, epidemiological, surgical, and functional outcomes, and cost/value data were recorded or calculated. RESULTS:A total of 179 patients with follow-up meeting inclusion criteria were identified: 68 with PLA alone and 111 with PLA + IBA. No statistical differences were noted in Oswestry Disability Index, 36-item Short-Form Health Survey scores, fusion rates, or cost/value at 6 months and at more than 3 years despite the PLA cohort being significantly older with more medical comorbidities. When length of stay was normalized across cohorts, the addition of an IBA increased hospital costs ranging from $577 to $5276, but this did not reach statistical significance. CONCLUSION:This single-center review of open surgical treatment of L4-L5 DS demonstrated that the addition of IBA to PLA added cost while producing equivalent results in fusion rates, Oswestry Disability Index, and 36-item Short-Form Health Survey scores when compared with PLA alone. LEVEL OF EVIDENCE:3.
journal_name
Spine (Phila Pa 1976)journal_title
Spineauthors
Gottschalk MB,Premkumar A,Sweeney K,Boden SD,Heller J,Yoon ST,Rhee JM,Leckie SK,Braly B,Simpson AK,Lenehan Edoi
10.1097/BRS.0000000000000856subject
Has Abstractpub_date
2015-06-15 00:00:00pages
917-25issue
12eissn
0362-2436issn
1528-1159pii
00007632-201506150-00010journal_volume
40pub_type
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