Using the appropriate sample size formula, it was decided that 174 records needed to be examined. Using the Excel random selection function, the MBB randomly identified the 174 records.

Some notes on the behaviour of sample size calculations and power for unequal group sizes This information was omitted from the video and so is included here as text. In many scenarios the ratio of ...

In this article, we propose approximate sample size formulas for establishing equivalence or noninferiority of two treatments in match-pairs design. Using the ratio of two proportions as the ...

We present a simple sample-size formula for weighted log-rank statistics applied to clustered survival data with variable cluster sizes and arbitrary treatment assignments within clusters. This ...

The relationship between sample size and the difference you consider worth looking for follows the inverse square law: if you halve the size of the difference, you quadruple the number of patients ...