Statistician: Two major studies found no causal link between medical procedure X and disorder Y, but these studies a...

Kath on September 27, 2019


I don't understand the even a doubling of the rate of disorder Y. Does it mean that even if the disorder Y has 0.04 of the population, the two studies still need more then 1100 people? Thank you!

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Irina on September 27, 2019


That's correct. This part of the argument refers to the fact that the disorder is so rare - only occurs in .02 percent of the population that even if it was double that - 0.04, 1100 people still would not be enough to detect it.

Let me know if you have any further questions.