Figure 1 displays the power approximated by the EEE procedure (x-axis) against the available simulated study power (y-axis) when the sample size of the available study is smaller than the sample size of the planned study with constant α level for both studies. A total of 540 data-points from 12 published studies [1, 2, 5–7, 9, 10, 13, 16, 17, 19, 20] are included in the Figure 1. The CCCs between available simulated power and EEE estimated power was 0.9886 (95% CI 0.9865 – 0.9903). The Pearson correlation coefficient was 0.9893 very close to CCC. We observed that there were only 24 (4%) out of 540 total observations discordant with EEE power versus available study power, where a difference of greater than 10% between simulated and EEE estimated power was observed. There were four extreme observations where the difference between EEE and available study power was close to 0.30. In these extreme observations, the ratio of the sample size of the planned study to available study was greater than 4 and given power of the available study was less than
