Drug shelf-life estimation
The shelf-life of a drug product is the time that the average drug characteristic (e.g., potency) remains within an approved specification after manufacture. The United States Food and Drug Administration (FDA) requires indication for every drug product of a shelf-life on the immediate container label. Since the true shelf-life of a drug product is typically unknown, it has to be estimated based on assay results of the drug characteristic from a stability study usually conducted during the process of drug development. Furthermore, the FDA requires that the estimated shelf-life be so constructed that it is statistically evident that the estimated shelf-life is less than the true shelf-life, i.e., the estimated shelf-life should be a conservative (negatively biased) estimator. In this paper, we study and compare several shelf-life estimators, one of which is adopted by the PDA's 1987 guidelines, in terms of their asymptotic biases and mean squared errors. Finite sample performance of some shelf-life estimators is examined in a simulation study.
Duke Scholars
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Related Subject Headings
- Statistics & Probability
- 4905 Statistics
- 0801 Artificial Intelligence and Image Processing
- 0199 Other Mathematical Sciences
- 0104 Statistics
Citation
Published In
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Statistics & Probability
- 4905 Statistics
- 0801 Artificial Intelligence and Image Processing
- 0199 Other Mathematical Sciences
- 0104 Statistics