Stats question

[stronghold]

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Two drugs have been used to treat a disease. Drug A causes 40% risk reduction, and drug B causes 30% risk reduction. The disease prevalence is 80/10000. Calculate NNT for this population.

Is it 100/10=10? or we have to consider the prevalence?

 

[ButterfingerBBs]

This question doesn't fully make sense to me, but if B is considered the standard of care and drug A is new to the market.

NNT =1 / Absolute Risk Reduction = 1 / ((80-32/10000) - (80-24/10000)) = 1/(24/10000) = 10000/24 = 417

 

[CaliAtenza]

where is the 32 and 24 coming from? Confused about that part.... NM, got it 🙂. Take the percentages given and then multiply that by the prevelance.