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powerMediation (version 0.0.7)

Power/Sample size calculation for mediation analysis

Description

The package contains functions for calculating power, sample size, and minimal detectable mediation effect for testing mediation effect in linear, logistic, poisson, or cox regression. The package also contains functions for calculating power, sample size, and minimal detectable slope for testing the slope in a simple linear regression (only one predictor).

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Version

Install

install.packages('powerMediation')

Monthly Downloads

451

Version

0.0.7

License

GPL (>= 2)

Maintainer

Weiliang Qiu

Last Published

August 17th, 2011

Functions in powerMediation (0.0.7)

powerMediation.VSMc

Power for testing mediation effect in linear regression based on Vittinghoff, Sen and McCulloch's (2009) method

Sample size for testing slope for simple linear regression

Power for testing slope for simple linear regression

ssMediation.VSMc

Sample size for testing mediation effect in linear regression based on Vittinghoff, Sen and McCulloch's (2009) method

minEffect.VSMc.cox

Minimum detectable slope for mediator in cox regression based on Vittinghoff, Sen and McCulloch's (2009) method

powerMediation.VSMc.poisson

Power for testing mediation effect in poisson regression based on Vittinghoff, Sen and McCulloch's (2009) method

minEffect.VSMc.logistic

Minimum detectable slope for mediator in logistic regression based on Vittinghoff, Sen and McCulloch's (2009) method

Minimum detectable slope

powerMediation.VSMc.cox

Power for testing mediation effect in cox regression based on Vittinghoff, Sen and McCulloch's (2009) method

ssMediation.VSMc.poisson

Sample size for testing mediation effect in poisson regression based on Vittinghoff, Sen and McCulloch's (2009) method

minEffect.VSMc.poisson

Minimum detectable slope for mediator in poisson regression based on Vittinghoff, Sen and McCulloch's (2009) method

testMediation.Sobel

P-value and confidence interval for testing mediation effect (Sobel's test)

Sample size for testing slope for simple linear regression based on R2

ssMediation.VSMc.cox

Sample size for testing mediation effect in cox regression based on Vittinghoff, Sen and McCulloch's (2009) method

powerMediation.Sobel

Power for testing mediation effect (Sobel's test)

powerMediation.VSMc.logistic

Power for testing mediation effect in logistic regression based on Vittinghoff, Sen and McCulloch's (2009) method

ssMediation.VSMc.logistic

Sample size for testing mediation effect in logistic regression based on Vittinghoff, Sen and McCulloch's (2009) method

ssMediation.Sobel

Sample size for testing mediation effectd (Sobel's test)

Power for testing slope for simple linear regression

Minimum detectable slope for mediator in linear regression based on Vittinghoff, Sen and McCulloch's (2009) method