In the power curve plot in a survival study, can I change the x-axis scale from log(HR) scale to HR scale?
A. A work-around is as follows: (1) Design the survival study (2) Click on the IM icon to go to the interim-monitoring module. Notice that bottom right table on the Interim Monitoring workbook displays the effect size (on the log hazard ratio scale) versus conditional power (CP). Since we are at the start of the trial and have not entered any data into this worksheet, this conditional power table is the same as the unconditional power table. (3) You can use the usual Excel copy and paste facility to copy all the numbers from this table and paste them into an Excel spreadsheet (or you can paste them into an East® Scratch Sheet using Insert>Scratch Sheet from the East® menu bar.) (4) Then you can easily transform the effect size column by exponentiating with an Excel formula and you can plot the graph with Excel.
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