NNTbiomarker (0.29.11)

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Calculate Design Parameters for Biomarker Validation Studies.

http://cran.r-project.org/web/packages/NNTbiomarker

Helps a clinical trial team discuss the clinical goals of a well-defined biomarker with a diagnostic, staging, prognostic, or predictive purpose. From this discussion will come a statistical plan for a (non-randomized) validation trial. Both prospective and retrospective trials are supported. In a specific focused discussion, investigators should determine the range of "discomfort" for the NNT, number needed to treat. The meaning of the discomfort range, [NNTlower, NNTupper], is that within this range most physicians would feel discomfort either in treating or withholding treatment. A pair of NNT values bracketing that range, NNTpos and NNTneg, become the targets of the study's design. If the trial can demonstrate that a positive biomarker test yields an NNT less than NNTlower, and that a negative biomarker test yields an NNT less than NNTlower, then the biomarker may be useful for patients. A highlight of the package is visualization of a "contra-Bayes" theorem, which produces criteria for retrospective case-controls studies.

Maintainer: Roger Day
Author(s): Roger Day

License: GPL-3

Uses: magrittr, mvbutils, shiny, stringr, xtable, ggplot2, plyr, testthat, knitr, rmarkdown

Released over 1 year ago.


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