University of Michigan Center for Statistical 


CaTS -- Power Calculator for Two Stage Association Studies


CaTS is a simple, multi-platform interface for carrying out power calculations for large genetic association studies, including two stage genome wide association studies. The calculations implemented in CaTS are described in Skol et al. (2006). Comments and suggestions are welcome, please e-mail Andrew Skol at

Note: A new web application adapting the CaTS algorithm for one-stage studies with multiplicative disease models can be found at Genetic Association Study GAS Power Calculator.


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