The correct application of the variance inflation factor approach for sample size calculations in trials that randomize intact clusters of individuals rests on knowledge of the variance of the outcome ...

References on sample size calculations for randomized studies with a continuous response are abundant. The sample size is usually calculated from a simple two-sample ...

The selection of suitable outcomes and sample size calculation are critical factors in the design of a randomised controlled trial (RCT). The goal of this study was to identify the range of outcomes ...