Dr.RaviCardio said:

One habit that pays for itself: post the method alongside the number.

Bookmarking. The distinction being drawn above is the one nobody else makes. Sending this to two other people who asked me the same thing last week.

Clinical perspective, offered as context rather than as advice. The distinction that resolves most of these threads is between what is true on average and what is true for one person. Both are real; they answer different questions and get quoted as if they were the same one.

Correct me if the detail matters more than I have assumed.

LindaRN_retired said:

The distinction that resolves most of these threads is between what is true on average and what is true for one person.

Same pattern here, and in the same order. Nothing to add that would improve it.

LindaRN_retired said:

The distinction that resolves most of these threads is between what is true on average and what is true for one person.

Adding the part of the answer the thread has not reached. It helps to ask what evidence would change your mind before you look at any. If nothing would, the discussion is not about evidence, and it is better to say so early than to spend nine posts discovering it.

Reporting back.

Closing the loop. The answer turned out to depend on the detail I had left out of the opening post, which is a lesson about how to ask rather than about the subject.