P2P payment apps (Venmo/Zelle) for pharmacy — looking for input

NurseKim_ATL said:

There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.

Careful with the causal language. Two things moving together in a period when five things changed is not a mechanism, and stating it as one makes the thread less useful to somebody reading it later.

Adding the numbers, since they settle part of this. The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the same conditions. Nobody wants that answer and it is still the answer.

BariatricNurseD said:

Two things moving together in a period when five things changed is not a mechanism, and stating it as one makes the thread less useful to somebody…

Adding the part of the answer the thread has not reached. Most of what circulates confidently in this community traces back to one summary of one study, and the qualifier was dropped somewhere in the third retelling.

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

What would you measure differently if you were starting again?

Closing the loop on my own question.

Closing this out. What actually changed my mind was the point about waiting for a trend instead of reading a single measurement, which is embarrassing in hindsight and worth saying anyway.