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ssutil  

Sample Size Calculation Tools
View on CRAN: Click here


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

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

Install by package version:
library("remotes")
install_version("ssutil", "1.0.0")



Attach the package and use:
library("ssutil")
Maintained by
John J. Aponte
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2025-06-12
Latest Update: 2025-06-12
Description:
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).
How to cite:
John J. Aponte (2025). ssutil: Sample Size Calculation Tools. R package version 1.0.0, https://cran.r-project.org/web/packages/ssutil. Accessed 05 Jun. 2026.
Previous versions and publish date:
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Complete documentation for ssutil
Functions, R codes and Examples using the ssutil R package
Full ssutil package functions and examples
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