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I am hoping to understand the difference between attributable risk and absolute risk reduction. Mathematically, the two entities seem equivalent, but the formulas for calculating their confidence interval are quite different (https://www2.ccrb.cuhk.edu.hk/stat/confidence interval/CI for relative risk.htm, https://www2.ccrb.cuhk.edu.hk/stat/confidence interval/CI for ratio.htm). I presumed that attributable risk is used in prospective studies in the context of discussing risk ratio, while ARR is used in retrospective studies in the context of discussing odds ratio.

I appreciate your feedback and comment.

GastroGuy
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    Both links are broken. – MarianD Feb 15 '21 at 07:20
  • @GastroGuy Please register &/or merge your accounts (you can find information on how to do this in the **My Account** section of our [help]), then you will be able to edit & comment on your own question. – Sycorax Feb 15 '21 at 21:37

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