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Noted Vertebroplasty Expert Cites Concerns About Recently Published Study
Date:8/11/2009

Dr. Mubin Syed evaluates findings; calls for additional research

DAYTON, Ohio, Aug. 11 /PRNewswire/ -- A new study by Mayo Clinic researchers has given rise to more questions than answers about the effectiveness of vertebroplasty to treat osteoporotic spinal fractures.

Vertebroplasty is a widely used procedure in which medical cement is injected into vertebrae to relieve pain and improve mobility in patients who have osteoporotic fractures. This study, funded by the National Institutes of Health, was the first of its kind, using a double-blinded research model to examine the impact of vertebroplasty. It was published last week in The New England Journal of Medicine to mixed reviews by the medical community.

"This was an extremely interesting study, but the results are far from conclusive due to several weaknesses in the method used. Additional research is definitely indicated," said Dr. Mubin I. Syed, a neuroradiologist and diagnostic, interventional and vascular radiologist.

One major issue cited by Dr. Syed was the small size of the study group. To demonstrate statistical differences between groups requires that the research team enroll enough patients for the statistics to have meaning. The original group size for the Mayo Clinic study was to be 250 patients. Due to difficulties in recruiting participants, the final group size was reduced to 131 people, nearly half of the original design.

"This is important," explained Dr. Syed, "because the trends in the data show that if the study had enough patients, the group receiving vertebroplasty could have demonstrated a clinically meaningful improvement in pain. It is therefore surprising that a study that was showing a trend toward statistical significance was terminated early with only half the number of patients recruited. A huge doubt now remains as to whether a study with the original i
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SOURCE Dr. Mubin I. Syed
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