| Who Should Have Surgery for Spinal Stenosis? Treatment Effect Predictors in SPORT. | |
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MedLine Citation:
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PMID: 23018805 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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STUDY DESIGN.: Combined prospective randomized controlled trial and observational cohort study of spinal stenosis (SpS) with an as-treated analysis. OBJECTIVE.: To determine modifiers of the treatment effect (TE) of surgery (the difference between surgical and nonoperative outcomes) for SpS using subgroup analysis. SUMMARY OF BACKGROUND DATA.: The Spine Patient Outcomes Research Trial demonstrated a positive surgical TE for SpS at the group level. However, individual characteristics may affect TE. No previous studies have evaluated TE modifiers in SpS. METHODS.: SpS patients were treated with either surgery (n = 419) or nonoperative care (n = 235) and were analyzed according to treatment received. Fifty-three baseline variables were used to define subgroups for calculating the time-weighted average TE for the Oswestry Disability Index (ODI) over 4 years (TE = ΔODIsurgery - ΔODInonoperative). Variables with significant subgroup × treatment interactions (P < 0.05) were simultaneously entered into a multivariate model to select independent TE predictors. RESULTS.: Other than smokers, all analyzed subgroups including at least 50 patients improved significantly more with surgery than with nonoperative treatment (P < 0.05). Multivariate analysis demonstrated: baseline ODI ≤ 56 (TE -15.0 vs. -4.4, ODI > 56, P < 0.001), not smoking (TE -11.7 vs. -1.6 smokers, P < 0.001), neuroforaminal stenosis (TE -14.2 vs. -8.7 no neuroforaminal stenosis, P = 0.002), predominant leg pain (TE -11.5 vs. -7.3 predominant back pain, P = 0.035), not lifting at work (TE -12.5 vs. -0.5 lifting at work, P = 0.017), and the presence of a neurological deficit (TE -13.3 vs. -7.2 no neurological deficit, P < 0.001) were associated with greater TE. CONCLUSION.: With the exception of smokers, patients who met strict inclusion criteria improved more with surgery than with nonoperative treatment, regardless of other specific characteristics. However, TE varied significantly across certain subgroups, and these data can be used to individualize shared decision making discussions about likely outcomes. Smoking cessation should be considered before surgery for SpS. |
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Authors:
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Adam Pearson; Jon Lurie; Tor Tosteson; Wenyan Zhao; William Abdu; James N Weinstein |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Spine Volume: 37 ISSN: 1528-1159 ISO Abbreviation: Spine Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-09-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7610646 Medline TA: Spine (Phila Pa 1976) Country: United States |
Other Details:
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Languages: eng Pagination: 1791-802 Citation Subset: IM |
Affiliation:
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*Department of Orthopaedics †Department of Medicine and Orthopaedics ‡Department of Community and Family Medicine, Dartmouth Medical School and the Dartmouth Institute for Health Policy and Clinical Practice, Hanover, NH. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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