welcome redditors!to snoo-finity ... and beyond!

NBME 20 Answers

nbme20/Block 2/Question#45

A new antiplatelet agent is developed for the ...

8%

Login to comment/vote.

 +2  upvote downvote
submitted by hayayah(399),

Absolute risk: the difference in risk (not the proportion) attributable to the intervention as compared to a control.

(.12) - (.04) = .08

ARR = 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. +1