longpower: Sample Size Calculations for Longitudinal Data

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The longpower package contains functions for computing power and sample size for linear models of longitudinal data based on the formula due to Liu and Liang (1997) and Diggle et al (2002). Either formula is expressed in terms of marginal model or Generalized Estimating Equations (GEE) parameters. This package contains functions which translate pilot mixed effect model parameters (e.g. random intercept and/or slope) into marginal model parameters so that the formulas of Diggle et al or Liu and Liang formula can be applied to produce sample size calculations for two sample longitudinal designs assuming known variance.

Author
Michael C. Donohue, Anthony C. Gamst, Steven D. Edland
Date of publication
2016-07-25 20:36:27
Maintainer
Michael C. Donohue <mdonohue@usc.edu>
License
GPL (>= 2)
Version
1.0-16
URLs

View on CRAN

Man pages

diggle.linear.power
Sample size calculations for difference in slopes between two...
edland.linear.power
Linear mixed model sample size calculations.
liu.liang.linear.power
Linear mixed model sample size calculations from Liu & Liang...
lmmpower
Sample size calculations for linear mixed models of rate of...
longpower-package
Sample size calculations for longitudinal data
power.longtest
Constructor function for class '"power.longtest"'
power.mmrm
Linear mixed model sample size calculations.
power.mmrm.ar1
Linear mixed model sample size calculations.
print.power.longtest
Print method for longitudinal data power calculation object

Files in this package

longpower
longpower/inst
longpower/inst/CITATION
longpower/inst/doc
longpower/inst/doc/longpower.R
longpower/inst/doc/longpower.Rnw
longpower/inst/doc/longpower.pdf
longpower/tests
longpower/tests/testthat.R
longpower/tests/testthat
longpower/tests/testthat/tests.R
longpower/NAMESPACE
longpower/R
longpower/R/longpower-package.R
longpower/R/power_mmrm.R
longpower/R/diggle.linear.power.R
longpower/R/edland.linear.power.R
longpower/R/liu.liang.linear.power.R
longpower/R/lmmpower.R
longpower/R/print.power.longtest.R
longpower/vignettes
longpower/vignettes/longpower.bib
longpower/vignettes/longpower.Rnw
longpower/MD5
longpower/build
longpower/build/vignette.rds
longpower/DESCRIPTION
longpower/man
longpower/man/diggle.linear.power.Rd
longpower/man/longpower-package.Rd
longpower/man/lmmpower.Rd
longpower/man/edland.linear.power.Rd
longpower/man/liu.liang.linear.power.Rd
longpower/man/power.mmrm.Rd
longpower/man/print.power.longtest.Rd
longpower/man/power.mmrm.ar1.Rd
longpower/man/power.longtest.Rd