Adding the clinical framing, because it changes how the question reads. Take it one variable at a time. Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent argument can untangle them after the fact.

BethLabQueen said:

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

Saving this. It is the first explanation that did not require me to already understand it.

Adding the clinical framing, because it changes how the question reads. The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either. Those three things can all be true at once, and most arguments here are two people holding different parts of that.

julia.endo said:

The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either.

Same pattern here, and in the same order.

Moderator note: a couple of off-topic posts removed. Thread quality here is what the rules are for. Keep it up.