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.
Package details 


Author  Weiliang Qiu <stwxq@channing.harvard.edu>, Jorge Chavarro <JCHAVARR@hsph.harvard.edu>, Ross Lazarus <ross.lazarus@channing.harvard.edu>, Bernard Rosner <stbar@channing.harvard.edu>, Jing Ma <jing.ma@channing.harvard.edu>. 
Maintainer  Weiliang Qiu <stwxq@channing.harvard.edu> 
License  GPL (>= 2) 
Version  0.1.0 
Package repository  View on CRAN 
Installation 
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