LibrarianMeg said:

Gallbladder warning for gallbladder risk: rapid weight loss increases gallstone risk regardless of method.

Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. Not convinced. The evidence being cited is consistent with the conclusion and also consistent with two other conclusions nobody has ruled out.

One concrete data point for the thread. For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine. Half the figures circulating in this community trace back to a secondary summary that dropped a qualifier.

NurseKim_ATL said:

The evidence being cited is consistent with the conclusion and also consistent with two other conclusions nobody has ruled out.

Adding the part of the answer the thread has not reached. Whatever the answer turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, and invite the correction. That is slower than asserting, and it is the only version that survives being wrong.

I would rather be corrected than agreed with, if it comes to it.

A narrower follow-up, since the general answer is now clear:

What would you measure differently if you were starting again?

Closing the loop on my own question.

Update, and it is the boring outcome: nothing was wrong. The measurement I was reading had moved less than its own week-to-week variation, which somebody said upthread and I did not believe.