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- W4386419005 abstract "Rigorous evaluation of surrogate endpoints is performed in a trial-level analysis in which the strength of the association between treatment effects on the clinical and surrogate endpoints is quantified across a collection of previously conducted trials. To reduce bias in measures of the performance of the surrogate, the statistical model must account for the sampling error in each trial's estimated treatment effects and their potential correlation. Unfortunately, these within-study correlations can be difficult to obtain, especially for meta-analysis of published trial results where individual patient data is not available. As such, these terms are frequently partially or completely missing in the analysis. We show that improper handling of these missing terms can meaningfully alter the perceived quality of the surrogate and we introduce novel strategies to handle the missingness." @default.
- W4386419005 created "2023-09-05" @default.
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- W4386419005 date "2023-09-03" @default.
- W4386419005 modified "2023-10-18" @default.
- W4386419005 title "Handling missing within‐study correlations in the evaluation of surrogate endpoints" @default.
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- W4386419005 doi "https://doi.org/10.1002/sim.9886" @default.
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