Package: bbssr Type: Package Title: Blinded Sample Size Re-Estimation for Binary Endpoints Version: 1.0.2 Date: 2025-06-14 Authors@R: person("Gosuke", "Homma", email = "my.name.is.gosuke@gmail.com", role = c("aut", "cre")) Description: Provides comprehensive tools for blinded sample size re-estimation (BSSR) in two-arm clinical trials with binary endpoints. Unlike traditional fixed-sample designs, BSSR allows adaptive sample size adjustments during trials while maintaining statistical integrity and study blinding. Implements five exact statistical tests: Pearson chi-squared, Fisher exact, Fisher mid-p, Z-pooled exact unconditional, and Boschloo exact unconditional tests. Supports restricted, unrestricted, and weighted BSSR approaches with exact Type I error control. Statistical methods based on Mehrotra et al. (2003) and Kieser (2020) . License: MIT + file LICENSE URL: https://github.com/gosukehommaEX/bbssr BugReports: https://github.com/gosukehommaEX/bbssr/issues Depends: R (>= 3.5.0) Imports: fpCompare, stats Suggests: testthat (>= 3.0.0), knitr, rmarkdown, dplyr, ggplot2, tibble, tidyr, Exact, exact2x2, microbenchmark VignetteBuilder: knitr Encoding: UTF-8 RoxygenNote: 7.3.2 Roxygen: list(markdown = TRUE) Config/testthat/edition: 3 Repository: https://gosukehommaex.r-universe.dev Date/Publication: 2025-06-18 21:37:38 UTC RemoteUrl: https://github.com/gosukehommaex/bbssr RemoteRef: HEAD RemoteSha: e7021ecf088e6ca25228d9df9816ec5bd8e5b7cd NeedsCompilation: no Packaged: 2026-07-18 06:47:16 UTC; root Author: Gosuke Homma [aut, cre] Maintainer: Gosuke Homma