primary endpoint

Definition / meaning of primary endpoint

The main result that is measured at the end of a study to see if a given treatment worked (e.g., the number of deaths or the difference in survival between the treatment group and the control group). What the primary endpoint will be is decided before the study begins.

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Find More About 'primary endpoint'

Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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