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Open Source Statistics for Public HealthDocumentationTestingAboutHelp

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Author(s)
Statistics
Kevin M. Sullivan, Emory University
based on code from John C. Pezzullo
Interface
Andrew G. Dean, EpiInformatics.com, and Roger A. Mir
Sample Size--Unmatched Case Control Study
This module calculates sample size for an unmatched case-control study.
You enter the desired confidence level, power, a hypothetical percentage of exposure among the controls, and either an odds ratio or a hypothetical percentage of exposure among the cases. Results are presented using methods of Kelsey, Fleiss, and Fleiss with a continuity correction.

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