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Rodrigues Adrian John,Varshneya Kunal,Stienen Martin Nikolaus,Schonfeld Ethan,Than Khoi Duc,Veeravagu Anand 대한척추외과학회 2023 Asian Spine Journal Vol.17 No.4
Study Design: Retrospective cohort study.Purpose: To characterize the postoperative outcomes and economic costs of anterior cervical discectomy and fusion (ACDF) procedures using synthetic biomechanical intervertebral cage (BC) and structural allograft (SA) implants.Overview of Literature: ACDF is a common spine procedure that typically uses an SA or BC for the cervical fusion. Previous studies that compared the outcomes between the two implants were limited by small sample sizes, short-term postoperative outcomes, and procedures with single-level fusion.Methods: Adult patients who underwent an ACDF procedure in 2007–2016 were included. Patient records were extracted from MarketScan, a national registry that captures person-specific clinical utilization, expenditures, and enrollments across millions of inpatient, outpatient, and prescription drug services. Propensity-score matching (PSM) was employed to match the patient cohorts across demographic characteristics, comorbidities, and treatments.Results: Of 110,911 patients, 65,151 (58.7%) received BC implants while 45,760 (41.3%) received SA implants. Patients who underwent BC surgeries had slightly higher reoperation rates within 1 year after the index ACDF procedure (3.3% vs. 3.0%, <i>p</i>=0.004), higher postoperative complication rates (4.9% vs. 4.6%, <i>p</i>=0.022), and higher 90-day readmission rates (4.9% vs. 4.4%, <i>p</i> =0.001). After PSM, the postoperative complication rates did not vary between the two cohorts (4.8% vs. 4.6%, <i>p</i>=0.369), although dysphagia (2.2% vs. 1.8%, <i>p</i><0.001) and infection (0.3% vs. 0.2%, <i>p</i>=0.007) rates remained higher for the BC group. Other outcome differences, including readmission and reoperation, decreased. Physician’s fees remained high for BC implantation procedures.Conclusions: We found marginal differences in clinical outcomes between BC and SA ACDF interventions in the largest published database cohort of adult ACDF surgeries. After adjusting for group-level differences in comorbidity burden and demographic characteristics, BC and SA ACDF surgeries showed similar clinical outcomes. Physician’s fees, however, were higher for BC implantation procedures.
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