I have been working on some data in collaboration with a statistician. As the data was not normally distributed a log-transformation was performed. However, it was explained to me that we cannot report effect sizes of our findings in the original units because of this transformation. We therefore resorted to using percentages.
I need to explain the reason for this in simple terms to collaborators (who are in the clinical field, not statisticians). Does anyone have suggestions of how to do this?