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NBME 20 Answers

nbme20/Block 2/Question#45 (26.5 difficulty score)
A new antiplatelet agent is developed for the ...
8%πŸ”
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 +4 
submitted by hayayah(1056),
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oAsebult rsi:k eth feceedfnri in rski t(on the ptroonri)po ttltabrieuab ot teh ttrneiinneov as padmoerc to a rocnlto.

2.)(1 - 0(.)4 = .80

RRA = %8

nwinkelmann  This isn't actually correct. Absolute risk is actually just the incidence, or the same as event rate. Absolute risk reduction = the difference in risk (not the proportion) attributable to the intervention as compared to the control, and thus ARR = incidence unexposed - incidence exposed x 100%. In this example, the incidence of exposed is the incidence in the new treatment group, and incidence unexposed is incidence in standard treatment group. +11