[R] Sample size: epiR survival

Karl Knoblick karlknoblich at yahoo.de
Tue Jun 2 16:49:10 CEST 2009

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Hallo!

Does anybody know what epiR calculates with method = "survival"? 

library(epiR)
library(survival)
epi.studysize(treat = .65, control = .50, n = NA, sigma = NA,
power = 0.80, r = 1, conf.level = 0.95, sided.test = 2, method = "survival")

Because I found out that method "proportion" does not do what I admitted, I am somehow careful with the examples....
 

Thanks!
Karl

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