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longpower: Sample Size Calculations for Longitudinal Data

Compute power and sample size for linear models of longitudinal data. Supported models include mixed-effects models and models fit by generalized least squares and generalized estimating equations. The package is described in Iddi and Donohue (2022) <doi:10.32614/RJ-2022-022>. Relevant formulas are derived by Liu and Liang (1997) <doi:10.2307/2533554>, Diggle et al (2002) <ISBN:9780199676750>, and Lu, Luo, and Chen (2008) <doi:10.2202/1557-4679.1098>.

Version: 1.0.27
Depends: R (≥ 3.0.0), lme4 (≥ 1.0), nlme
Imports: methods
Suggests: gee, testthat, knitr, rmarkdown
Published: 2024-09-05
DOI: 10.32614/CRAN.package.longpower
Author: Michael C. Donohue [aut, cre], Steve D. Edland [ctb], Nan Hu [ctb]
Maintainer: Michael C. Donohue <mdonohue at usc.edu>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
URL: https://github.com/mcdonohue/longpower
NeedsCompilation: no
Citation: longpower citation info
In views: ClinicalTrials, MixedModels
CRAN checks: longpower results

Documentation:

Reference manual: longpower.pdf
Vignettes: Power for linear models of longitudinal data with applications to Alzheimer's Disease Phase II study design (source, R code)

Downloads:

Package source: longpower_1.0.27.tar.gz
Windows binaries: r-devel: longpower_1.0.27.zip, r-release: longpower_1.0.27.zip, r-oldrel: longpower_1.0.27.zip
macOS binaries: r-release (arm64): longpower_1.0.27.tgz, r-oldrel (arm64): longpower_1.0.27.tgz, r-release (x86_64): longpower_1.0.27.tgz, r-oldrel (x86_64): longpower_1.0.27.tgz
Old sources: longpower archive

Reverse dependencies:

Reverse imports: PSS.Health

Linking:

Please use the canonical form https://CRAN.R-project.org/package=longpower to link to this page.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.