ssutil: Sample Size Calculation Tools
Functions for sample size estimation and simulation in clinical trials. Includes methods for selecting the best group using the Indifference-zone approach, as well as designs for non-inferiority, equivalence, and negative binomial models. For the sample size calculation for non-inferiority of vaccines, the approach is based on Fleming, Powers, and Huang (2021) <doi:10.1177/1740774520988244>. The Indifference-zone approach is based on Sobel and Huyett (1957) <doi:10.1002/j.1538-7305.1957.tb02411.x> and Bechhofer, Santner, and Goldsman (1995, ISBN:978-0-471-57427-9).
| Version: | 1.1.0 |
| Depends: | R (≥ 4.1) |
| Imports: | stats, stringr, broom, MASS, gsDesign, mvtnorm, tibble |
| Suggests: | knitr, rmarkdown, spelling, testthat (≥ 3.0.0) |
| Published: | 2026-09-06 |
| DOI: | 10.32614/CRAN.package.ssutil |
| Author: | John J. Aponte 
[aut, cre],
Chris Gast [ctb] |
| Maintainer: | John J. Aponte <john.j.aponte at gmail.com> |
| BugReports: | https://github.com/johnaponte/ssutil/issues |
| License: | AGPL (≥ 3) |
| URL: | https://johnaponte.github.io/ssutil/, https://github.com/johnaponte/ssutil |
| NeedsCompilation: | no |
| Language: | en-US |
| Materials: | README, NEWS |
| CRAN checks: | ssutil results |
Documentation:
Downloads:
| Package source: | ssutil_1.1.0.tar.gz |
| Windows binaries: | r-devel: ssutil_1.1.0.zip, r-release: ssutil_1.1.0.zip, r-oldrel: ssutil_1.1.0.zip |
| macOS binaries: | r-release (arm64): ssutil_1.0.0.tgz, r-oldrel (arm64): ssutil_1.0.0.tgz, r-release (x86_64): ssutil_1.1.0.tgz, r-oldrel (x86_64): ssutil_1.1.0.tgz |
| Old sources: | ssutil archive |
Linking:
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