[R] Sample size - proportion continuity correction

[Frank E Harrell Jr]

Karl Knoblick wrote:
> Hallo!
> 
> Does anybody know how to calculate a sample size estimation for proportions with continuity correction?

That would lose power.

Frank

>  
> I only found EpiR which seems to calculate without continuity correction:
> 
> library(epiR)
> epi.studysize(treat = .65, control = .50, n = NA, sigma = NA,
> power = 0.80, r = 1, conf.level = 0.95, sided.test = 2, method = "cohort")
> $n
> [1] 340
> 
> 
> Thanks!
> Karl
> 
> 
> 
> 
> 
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-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University