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Biostatistics 16

In a clinical trial investigating the efficacy of a new medication for hypertension, 500 participants are randomized to receive either the new medication or placebo. After one year, the incidence of stroke in the treatment group is 10%, while in the control group it is 15%.

Which of the following is the correct calculation of the absolute risk reduction (ARR) associated with the medication?

  • A) ARR = 5%
  • B) ARR = 10%
  • C) ARR = 15%
  • D) ARR = 33.3%
  • E) ARR = 100%


Dr. Ted O'Connell


Dr. Ted O'Connell