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powerMediation (version 0.2.4)

Power/Sample Size Calculation for Mediation Analysis

Description

Functions to calculate power and sample size for testing (1) mediation effects; (2) the slope in a simple linear regression; (3) odds ratio in a simple logistic regression; (4) mean change for longitudinal study with 2 time points; (5) interaction effect in 2-way ANOVA; and (6) the slope in a simple Poisson regression.

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Version

Install

install.packages('powerMediation')

Monthly Downloads

451

Version

0.2.4

License

GPL (>= 2)

Maintainer

Weiliang Qiu

Last Published

May 8th, 2015

Functions in powerMediation (0.2.4)

minEffect.VSMc.poisson

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

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

powerMediation.VSMc.logistic

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

Power for testing slope for simple linear regression

powerMediation.VSMc

Power 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

SSizeLogisticBin

Calculating sample size for simple logistic regression with binary predictor

powerLogisticCon

Calculating power for simple logistic regression with continuous predictor

Power calculation for longitudinal study with 2 time point

powerLogisticBin

Calculating power for simple logistic regression with binary predictor

ssMediation.Sobel

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

Power for testing slope for simple linear regression

testMediation.Sobel

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

ssLong.multiTime

Sample size calculation for testing if mean changes for 2 groups are the same or not for longitudinal study with more than 2 time points

powerMediation.VSMc.poisson

Power for testing mediation effect in poisson 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.logistic

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

SSizeLogisticCon

Calculating sample size for simple logistic regression with continuous predictor

ssMediation.VSMc.cox

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

powerMediation.VSMc.cox

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

Sample size calculation for longitudinal study with 2 time point

Sample size calculation for simple Poisson regression

powerLong.multiTime

Power calculation for testing if mean changes for 2 groups are the same or not for longitudinal study with more than 2 time points

Power calculation for longitudinal study with 2 time point

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

powerMediation.Sobel

Power for testing mediation effect (Sobel's test)

Sample size for testing slope for simple linear regression

Minimum detectable slope

ssMediation.VSMc

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

Power calculation for simple Poisson regression

Sample size calculation for longitudinal study with 2 time point

Power for detecting interaction effect in 2-way ANOVA

ssMediation.VSMc.logistic

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