Re: [R] Sample size - proportion continuity correction

2009-06-02 Thread 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 = .

[R] Sample size - proportion continuity correction

2009-06-02 Thread Karl Knoblick
Hallo! Does anybody know how to calculate a sample size estimation for proportions with continuity correction?   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