Functions to calculate power and sample size for testing main effect or interaction effect in the survival analysis of epidemiological studies (nonrandomized studies), taking into account the correlation between the covariate of the interest and other covariates. Some calculations also take into account the competing risks and stratified analysis. This package also includes a set of functions to calculate power and sample size for testing main effect in the survival analysis of randomized clinical trials and conditional logistic regression for nested casecontrol study.
Package details 


Author  Weiliang Qiu, Jorge Chavarro, Ross Lazarus, Bernard Rosner, Jing Ma. 
Maintainer  Weiliang Qiu <weiliang.qiu@gmail.com> 
License  GPL (>= 2) 
Version  0.1.3 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.