BACKGROUND: Evidence-based clinical practice requires the incorporation of information available in the medical literature into clinical decision making. Reliance on randomized trials as criteria for making recommendations is usually impractical. Conclusions based on low-quality information or post hoc analysis of high-quality information must be interpreted with caution. PURPOSE: To present a clinical research ‘case report’ as means to describe common pitfalls faced by authors, editors, and readers of the medical literature with a focus on spinal surgery. STUDY DESIGN/SETTING: This article describes a historical cohort study performed at a university hospital. PATIENT SAMPLE: One hundred thirty-eight consecutive patients treated with single-level anterior cervical discectomy and fusion (ACDF) by a single surgeon. OUTCOMES MEASURE: The primary outcome measure was the need for reoperation. METHODS: The authors performed a retrospective cohort comparison of 138 consecutive patients treated with single-level ACDF using either constrained or translational plates. The primary outcome measure of interest was the need for reoperation at the index or adjacent level. The mean follow-up exceeded 3 years in both groups. RESULTS: Patients treated with a single-level ACDF using a translational plate had a decreased incidence of reoperation compared with those treated with a constrained plate (1.6% translational, 12% constrained). This result was initially felt to be statistically significant when analyzed primarily (p<.05). When further analysis was used to account for potential differences in the patient populations, the significance of this result was lost (p=.16). CONCLUSIONS: Faulty study design or overaggressive statistical data mining leads to unreliable conclusions. It is important that practicing spinal surgeons appreciate the perils and pitfalls of interpretation of the medical literature. Common sense, clinical experience, and healthy skepticism are indispensable for the rational incorporation of lesser quality information from the medical literature into clinical decision making Keywords : Adult,analysis,Bone Plates,Cervical Vertebrae,Cohort Studies,Decision Making,Diskectomy,Female,Humans,Incidence,instrumentation,Male,methods,Middle Aged,Patients,Reoperation,Research Design,Retrospective Studies,Spinal Fusion,Spine,statistics & numerical data,surgery,, Pitfalls,Interpretation,Medical, tudor physiotherapy
Date of Publication : 2009 Nov
Authors : Resnick DK;Rajpal S;Steinmetz MP;
Organisation : Department of Neurological Surgery, University of Wisconsin School of Medicine, K4/834 Clinical Science Center, 600 Highland Avenue, Madison, WI 53792, USA. resnick@neurosurg.wisc.edu
Journal of Publication : Spine J
Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/19664970
The London Spine Unit : Harley Street UK. Specialists in Cutting Edge Technologies for Spinal Surgery
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