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YPInterimTesting  

Interim Monitoring Using Adaptively Weighted Log-Rank Test in Clinical Trials
View on CRAN: Click here


Download and install YPInterimTesting package within the R console
Install from CRAN:
install.packages("YPInterimTesting")

Install from Github:
library("remotes")
install_github("cran/YPInterimTesting")

Install by package version:
library("remotes")
install_version("YPInterimTesting", "1.0.3")



Attach the package and use:
library("YPInterimTesting")
Maintained by
Daewoo Pak
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2017-11-17
Latest Update: 2019-06-07
Description:
For any spending function specified by the user, this package provides corresponding boundaries for interim testing using the adaptively weighted log-rank test developed by Yang and Prentice (2010 <doi:10.1111/j.1541-0420.2009.01243.x>). The package uses a re-sampling method to obtain stopping boundaries at the interim looks.The output consists of stopping boundaries and observed values of the test statistics at the interim looks, along with nominal p-values defined as the probability of the test exceeding the specific observed test statistic value or critical value, regardless of the test behavior at other looks. The asymptotic validity of the stopping boundaries is established in Yang (2018 <doi:10.1002/sim.7958>).
How to cite:
Daewoo Pak (2017). YPInterimTesting: Interim Monitoring Using Adaptively Weighted Log-Rank Test in Clinical Trials. R package version 1.0.3, https://cran.r-project.org/web/packages/YPInterimTesting. Accessed 26 Aug. 2026.
Previous versions and publish date:
(2026-07-09 08:30), 0.1.0 (2017-11-17 20:05), 1.0.0 (2018-11-27 00:40), 1.0.1 (2019-03-15 23:33), 1.0.2 (2019-03-22 15:03)
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Other R packages that YPInterimTesting depends, imports, suggests or enhances
Complete documentation for YPInterimTesting
Functions, R codes and Examples using the YPInterimTesting R package
Some associated functions: YPInterimTesting-internal . YPInterimTesting-package . virtual . ypinterim . 
Some associated R codes: RcppExports.R . fun_estimate.R . fun_interpol.R . fun_less.R . print.ypinterim.R . summary.ypinterim.R . ypinterim.R . ypinterim.default.R .  Full YPInterimTesting package functions and examples
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