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The Core Outcome Measures Index (COMI) is a short, multidimensional outcome instrument, with excellent psychometric properties, that has been recommended for use in monitoring the outcome of spinal surgery from the patient's perspective. This study examined the feasibility of implementation of COMI and its performance in clinical practice within a large(More)
STUDY DESIGN Longitudinal study of the measurement properties of a brief outcome instrument. OBJECTIVE In patients undergoing surgery for lumbar spinal stenosis, we compared the responsiveness of the Core Outcome Measures Index (COMI) with that of the condition-specific Swiss Spinal Stenosis Measure (SSM), an instrument developed to assess patients with(More)
STUDY DESIGN Prospective study. OBJECTIVE To examine the association between structural abnormalities recorded on magnetic resonance imaging (MRI) and outcome after evidence-based conservative treatment in patients with chronic nonspecific low back pain (LBP). SUMMARY OF BACKGROUND DATA In most guidelines for the management of LBP, MRI is not(More)
STUDY DESIGN An in vitro biomechanical study of C1-C2 posterior fusion techniques was conducted using a cadaveric model. OBJECTIVE To investigate and compare the acute stability afforded by a novel rod-based construct that uses direct polyaxial screw fixation to C1 and C2 with contemporary transarticular screw and wire techniques. SUMMARY AND BACKGROUND(More)
Randomised controlled trials (RCTs) of cervical disc arthroplasty vs fusion generally show slightly more favourable results for arthroplasty. However, RCTs in surgery often have limited external validity, since they involve a select group of patients who fit very rigid admission criteria and who are prepared to subject themselves to randomisation. The aim(More)
STUDY DESIGN This is a prospective, multicenter cohort study including 8 medical centers in the metropolitan area of the Canton Zurich, Switzerland. OBJECTIVES To examine whether outcome and quality of life might improve after decompression surgery for degenerative lumbar spinal stenosis (DLSS) even in patients older than 80 years and to compare data with(More)
STUDY DESIGN Prospective study with 12-month follow-up. OBJECTIVE To examine how the relative severity of low back pain (LBP) to leg/buttock pain (LP) influences the outcome of decompression surgery for spinal stenosis. SUMMARY OF BACKGROUND DATA Decompression surgery is a common treatment for lumbar spinal canal stenosis, with generally good outcome.(More)
BACKGROUND CONTEXT Recent years have witnessed a shift in the assessment of spine surgical outcomes with a greater focus on the patient's perspective. However, this approach has not been widely extended to the assessment of complications. PURPOSE The present study sought to quantify the patient-rated impact/severity of complications of spine surgery and(More)
INTRODUCTION Clinical symptoms in lumbar degenerative spondylolisthesis (LDS) vary from predominantly radiating pain to severe mechanical low back pain. We examined whether the outcome of surgery for LDS varied depending on the predominant baseline symptom and the treatment administered [decompression with fusion (D&F) or decompression alone (D)]. METHODS(More)
BACKGROUND Craniovertebral arthrodesis in the upper cervical spine is challenging because of the high degree of mobility afforded by this region. A novel method for achieving atlantoaxial fixation with use of polyaxial screws inserted bilaterally into the lateral masses of C1 and transpedicularly into C2 with longitudinal rod connection has recently been(More)