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Effect size and clinical significance

Understand the model, recognise it in a stem, separate the look-alikes, then apply it.

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Watch it explainedNinety seconds, from the trap to the answer.
1000 people, untreated2 in 100 have the event · the drug prevents 1 of them
"Halves your risk" can mean 2 in 100 becomes 1 in 100. Always ask: halved from what?
p says whether; says how much.

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