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Qu Y. Statistical evaluation of surrogate markers: Validity, efficiency, and sensitivity. Clin Trials 2013; 10:693-5. [DOI: 10.1177/1740774513499652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Identification of surrogate markers for a marketed drug is important in monitoring the efficacy or safety after a patient uses the drug. In this article, we clarify the statistical definitions of the surrogate endpoint and surrogate marker and introduce the concept of the validity and efficiency of a surrogate marker. We also review some existing methods and suggest the proportion of information gain is appropriate to be used to evaluate the validity of a surrogate marker.
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Affiliation(s)
- Yongming Qu
- Department of Biometrics, Lilly Corporate Center, Eli Lilly and Company, Indianapolis, IN, USA
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