In a letter concerning absolute and relative risk reductions,1 the first paragraph of the letter should have concluded with the following sentence: “Relative risk reduction does not take into account the incidence of primary and secondary end points, which is expressed by the absolute risk reduction.” Because of an error introduced during copyediting, the term “incidence of” was missing from the published version. In addition, the surname of the letter author was spelled incorrectly; it should be Kerigan.
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