BE parallel studies with more than 2 arms [Power / Sample Size]
Did anybody encounter a situation with a BE study with more than 2 arms (i.e. Ref 1, Ref 2, and Test)? I understand it might sound weird but it can be a real case. Is there any adjustment for the sample size calculation in this instance? Any other adjustments, like for the power, etc?
Edit: Category changed; see also this post #1. [Helmut]