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- W4313483705 abstract "The Multiple Comparison Procedures with Modeling Techniques (MCP-Mod) framework has been recently approved by the U.S. Food and Administration and European Medicines Agency as fit-per-purpose for phase II studies. Nonetheless, this approach relies on the asymptotic properties of Maximum Likelihood (ML) estimators, which might not be reasonable for small sample sizes. In this paper, we derived improved ML estimators and correction for their covariance matrices in the censored Weibull regression model based on the corrective and preventive approaches. We performed two simulation studies to evaluate ML and improved ML estimators with their covariance matrices in (i) a regression framework (ii) the Multiple Comparison Procedures with Modeling Techniques framework. We have shown that improved ML estimators are less biased than ML estimators yielding Wald-type statistics that controls type I error without loss of power in both frameworks. Therefore, we recommend the use of improved ML estimators in the MCP-Mod approach to control type I error at nominal value for sample sizes ranging from 5 to 25 subjects per dose." @default.
- W4313483705 created "2023-01-06" @default.
- W4313483705 creator A5056938538 @default.
- W4313483705 creator A5065427066 @default.
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- W4313483705 date "2022-12-31" @default.
- W4313483705 modified "2023-09-30" @default.
- W4313483705 title "Improved inference for MCP-Mod approach for time-to-event endpoints with small sample sizes" @default.
- W4313483705 doi "https://doi.org/10.48550/arxiv.2301.00325" @default.
- W4313483705 hasPublicationYear "2022" @default.
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