I have data for multiple cohorts - some cohort level data has been normalized via Z-scores, and some has been normalized via log transformations. (Agh.) Is there any way to compare them? Can I convert the Z-scores back to raw data, then log transform them? (I do have the mean & SD for the raw data of the Z-scored cohorts).
Also - I saw this post: How to log transform Z-scores?, but as I have multiple cohorts I need to be sure that the data is all on the same scale / transformed in the same way.
Any thoughts would be helpful.