Bioequivalence and Bioavailability Forum

Hi Helmut,

❝ This doesn’t makes sense to me. Do you mean data for a test product (in % of the reference)?

Actually the 90% CI is for the test-reference

❝ Duno. I don’t believe in these numbers – where do they come from?

I don't have any raw data, just got this confidence interval (on -20% to +20%) scale from my boss. And its a two way cross over study with 21 subjects. On the basis of which my objective is to calculate the sample size. Which I will be doing with R software and the FARTSSIE Excel sheet. So, it came in my mind why not to transform this CI into (80.00 to 125.00)%. It should be possible? Does there exist any such transformation relation between these two different CI scales i.e (80.00 to 125.00)% and (-20.00 to +20.00)?

Thanks & Regards
Anu