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Previous Volume 356:2257-2270 May 31, 2007 Number 22 Next

	Full Text PDF PDA Full Text PowerPoint Slide Set Perspective by Deyo, R. A. Letters Add to Personal Archive Add to Citation Manager Notify a Friend E-mail When Cited E-mail When Letters Appear PubMed Citation

ABSTRACT

Background Management of degenerative spondylolisthesis with spinal stenosis is controversial. Surgery is widely used, but its effectiveness in comparison with that of nonsurgical treatment has not been demonstrated in controlled trials.

Methods Surgical candidates from 13 centers in 11 U.S. states who had at least 12 weeks of symptoms and image-confirmed degenerative spondylolisthesis were offered enrollment in a randomized cohort or an observational cohort. Treatment was standard decompressive laminectomy (with or without fusion) or usual nonsurgical care. The primary outcome measures were the Medical Outcomes Study 36-Item Short-Form General Health Survey (SF-36) bodily pain and physical function scores (100-point scales, with higher scores indicating less severe symptoms) and the modified Oswestry Disability Index (100-point scale, with lower scores indicating less severe symptoms) at 6 weeks, 3 months, 6 months, 1 year, and 2 years.

Results We enrolled 304 patients in the randomized cohort and 303 in the observational cohort. The baseline characteristics of the two cohorts were similar. The one-year crossover rates were high in the randomized cohort (approximately 40% in each direction) but moderate in the observational cohort (17% crossover to surgery and 3% crossover to nonsurgical care). The intention-to-treat analysis for the randomized cohort showed no statistically significant effects for the primary outcomes. The as-treated analysis for both cohorts combined showed a significant advantage for surgery at 3 months that increased at 1 year and diminished only slightly at 2 years. The treatment effects at 2 years were 18.1 for bodily pain (95% confidence interval [CI], 14.5 to 21.7), 18.3 for physical function (95% CI, 14.6 to 21.9), and –16.7 for the Oswestry Disability Index (95% CI, –19.5 to –13.9). There was little evidence of harm from either treatment.

Conclusions In nonrandomized as-treated comparisons with careful control for potentially confounding baseline factors, patients with degenerative spondylolisthesis and spinal stenosis treated surgically showed substantially greater improvement in pain and function during a period of 2 years than patients treated nonsurgically. (ClinicalTrials.gov number, NCT00000409 [ClinicalTrials.gov] .)

Source Information

From the Departments of Orthopaedics (J.N.W., B.H., E.A.B., W.A.A.), Medicine (J.D.L., A.N.A.T.), and Community and Family Medicine (J.N.W., T.D.T., A.N.A.T.), Dartmouth Medical School, Lebanon, NH; the University of Michigan, Ann Arbor (N.J.O.B.); the Rothman Institute at Thomas Jefferson University, Philadelphia (A.S.H., T.J.A.); William H. Beaumont Hospital, Royal Oak, MI (H.H.); the Hospital for Special Surgery, New York (F.P.C.); the University Hospitals of Cleveland and Case Western Reserve University, Cleveland (S.E.E.); Washington University, St. Louis (L.G.L.); the Nebraska Foundation for Spinal Research, Omaha (M.L.); the Hospital for Joint Diseases, New York (T.J.E.); and the University of California at San Francisco, San Francisco (S.S.H.).

Address reprint requests to Dr. Weinstein at SPORT{at}dartmouth.edu.

Full Text of this Article

Related Letters:

Surgical versus Nonsurgical Treatment for Back Pain
da Costa B. R., Johnston B. C., Copeland B., Weinstein J. N., Lurie J. D., Tosteson T. D., Deyo R. A.
Extract | Full Text | PDF  
N Engl J Med 2007; 357:1255-1256, Sep 20, 2007. Correspondence

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