[R] power of logistic regression in case control design

From: Bingshan Li <bli1_at_bcm.tmc.edu>
Date: Thu, 07 Jun 2007 17:15:05 -0500

Hi All,

This is not directly related to R but I post the questions here since there are a lot of experts on statistics. I want to calculate power of logistic regression using likelihood ratio test in unmatched case control design. The paper I have read is "power calculations for likelihood ratio tests in generalized linear models" by Steven G. Self in 1992. They showed a formula for calculating power for prospective cohort design. Can I plug in the various parameters from case control study? That is, can I pretend that the case control data I have is a prospective cohort study? I guess I can do this since in principal logistic regression is valid for both case control and cohort design in estimating odds ratio.

Thanks a lot!

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