Many therapeutic and most preventive trials require a very large number of participants in order to have sufficient statistical power to detect meaningful effects. What are 3 factors that generally must be taken into account when designing studies to ensure investigators have a sufficient sample size?
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Source: Maximo wrote question based on Chapter 7 of Ashengrau and Seage page 184
Source: Maximo wrote question based on Chapter 7 of Ashengrau and Seage page 184
