Example: biology
Sample Size Formulas for Different Study Designs
For brevity, we restrict discussion to the sample size estimation of the parallel design. We refer to the book by Chow et al. 2 for other subtypes of RCT designs and refer to 3,4 for non-randomized interventional studies. In a parallel RCT, the outcome of interest could be a continuous, dichotomous, or a time-
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