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Postoperative improvement in health-related quality of life: a national comparison of surgical treatment for focal (one- to two-level) lumbar spinal stenosis compared with total joint arthroplasty for osteoarthritis

BACKGROUND CONTEXT: The results of single-center studies have shown that surgical intervention for lumbar spinal stenosis yielded comparable health-related quality of life (HRQoL) improvement to total joint arthroplasty (TJA). Whether these results are generalizable to routine clinical practice in Canada is unknown. PURPOSE: The primary purpose of this equivalence study was to compare the relative improvement in physical HRQoL after surgery for focal lumbar spinal stenosis (FLSS) compared with TJA for hip and knee osteoarthritis (OA) across six Canadian centers. STUDY DESIGN/SETTING: A Canadian multicenter ambispective cohort study. PATIENT SAMPLE: A cohort of 371 primary one- to two-level spinal decompression (n=214 with instrumented fusion) for FLSS (n=179 with degenerative lumbar spondylolisthesis [DLS]) was compared with a cohort of primary total hip (n=156) and knee (n=208) arthroplasty for OA. OUTCOME MEASURES: The primary outcome was the change in preoperative to 2-year postoperative 36-Item Short Form Health Survey Physical Component Summary (PCS) score as reflected by the number of patients reaching minimal clinically important difference (MCID) and substantial clinical benefit (SCB). METHODS: Univariate analyses were conducted to identify baseline differences and factors that were significantly related to outcomes at 2 years. Multivariable regression modeling was used as our primary analysis to compare outcomes between groups. RESULTS: The mean age (years) and percent females for the spine, hip, and knee groups were 63.3/58.5, 66.0/46.9, and 65.8/64.3, respectively. All three groups experienced significant improvement of baseline PCS (p<.001). Multivariate analyses, adjusting for baseline differences (age, gender, baseline Mental Component Summary score, baseline PCS), demonstrated no significant differences in PCS outcome between spinal surgery and arthroplasty (combined hip and knee cohorts) patients with an odds ratio of 0.80 (95% confidence interval [CI], 0.57-1.11; p=.17) and 0.79 (95% CI, 0.58-1.09; p=.15) for achieving MCID or SCB, respectively. In subgroup analysis, spine and knee outcomes were not significantly different, with hip arthroplasty superior to both (p<.0001). CONCLUSIONS: Significant improvement in physical HRQoL after surgical treatment of FLSS (including DLS) is consistently achieved nationally. Our overall results demonstrate that a comparable number of patients can expect to achieve MCID and SCB 2 years after surgical intervention for FLSS and total knee arthroplasty Keywords : Aged,analysis,Arthroplasty,Arthroplasty,Replacement,Hip,Arthroplasty,Replacement,Knee,Canada,Cohort Studies,Female,Hip,Humans,Knee,Male,methods,Middle Aged,Neurosurgery,Odds Ratio,Ontario,Osteoarthritis,Outcome Assessment (Health Care),Patients,Quality of Life,Spinal Fusion,Spinal Stenosis,Spine,Spondylolisthesis,statistics & numerical data,surgery,Treatment Outcome,Universities,, Improvement,Healthrelated,Quality, facet denervation

Date of Publication : 2011 Nov

Authors : Rampersaud YR;Wai EK;Fisher CG;Yee AJ;Dvorak MF;Finkelstein JA;Gandhi R;Abraham EP;Lewis SJ;Alexander DI;Oxner WM;Davey JR;Mahomed N;

Organisation : Division of Orthopaedic Surgery and Neurosurgery, Department of Surgery, University of Toronto, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada. raja.rampersaud@uhn.on.ca

Journal of Publication : Spine J

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/22122836

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