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To Learn More About Parathyroid Cancer

    For more information from the National Cancer Institute about parathyroid cancer, see the Parathyroid Cancer Home Page.

    For general cancer information and other resources from the National Cancer Institute, see the following:

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    Study Design Categories, Definitions, and Levels of Evidence

    Prospective, randomized, controlled trials and meta-analyses of prospective, randomized, controlled trials. The randomized, double-blinded, controlled trial is the gold standard of study design. To achieve this ranking, the study allocation must be blinded to the investigator both before and after the randomization and the assignment to intervention group. This design provides protection from allocation bias by the investigator and from bias in the assessment of outcomes by both the...

    Read the Study Design Categories, Definitions, and Levels of Evidence article > >

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      WebMD Public Information from the National Cancer Institute

      Last Updated: February 25, 2014
      This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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