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Simplicity of randomized, controlled trials of percutaneous vertebroplasty

Joshua A Hirsch1, Huy M Do, David Kallmes

  • 1Havard Medical School, Massachusetts General Hospital, Boston, MA, USA. jhirsch@partners.org

Pain Physician
|August 2, 2006
PubMed
Abstract

No abstract available in PubMed .

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Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.