EndoResFellow said:

It helps to say which part of this you are uncertain about.

Coming at EndoResFellow’s question from a different direction. Order of operations matters more than any single choice here: establish a baseline, change one thing, wait long enough for it to express itself, then measure again under the same conditions.

Found this through search years later and it is still the best discussion of the question, so adding one thing. Keep the original post as written when you update it, and add the correction underneath. An edited-away mistake is invisible to the next person who makes it.

Happy to go further on any of that.

Following on from EndoResFellow — and this may be the naive question:

Did your prescriber agree with that reading, and if not what was their objection?

bri_stats said:

Keep the original post as written when you update it, and add the correction underneath.

I do not accept the framing. The question has been narrowed to the version that has a tidy answer, and the part that was dropped is the part the OP actually asked about.

bri_stats said:

Keep the original post as written when you update it, and add the correction underneath.

Right, and the exception is worth naming rather than left implied, because the exception is where people get into trouble.