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Sample Size Estimation in Research With Dependent Measures and Dichotomous Outcomes

Kevin L. Delucchi, PhD



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  		FIGURE 1—— Required sample size as a function of correlation of covariates with treatment group membership.

 


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  		FIGURE 2—— Number of study participants per group as a function of correlation for 3 correlation matrices: compound symmetric (CS), autoregressive step 1 (AR1), and a midpoint between them ({theta} = 0.5).

 




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