Endgames Statistical question

Relative risk reduction and absolute risk reduction

BMJ 2009; 339 doi: http://dx.doi.org/10.1136/bmj.b3626 (Published 16 September 2009) Cite this as: BMJ 2009;339:b3626
  1. Siva K Talluri, clinical assistant professor
  1. 1Mclaren Regional Medical Center, Flint, MI 48532, USA
  1. talluri1{at}msu.edu

    In a trial comparing a drug with a placebo for the prevention of stroke, the incidence of stroke at 1 year was 3% in the group receiving drug A (treatment group) and 4% in the group receiving placebo (control group); P=0.01.

    What is the reduction in incidence of stroke in patients treated with drug A compared with those on placebo, and what is the difference in incidence between the …

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