To what extent is alcohol consumption associated with breast cancer recurrence and second primary breast cancer?: A systematic review

Abstract

Background The association between alcohol intake and breast cancer recurrence or development of second primary breast cancer in the survivor population is unclear. The aim of this systematic review was to evaluate the existing evidence to assess the extent to which alcohol consumption is associated with breast cancer recurrence and second primary breast cancer. Methods Six databases (Cochrane Library, EMBASE, MEDLINE, PubMed, Scopus and Web of Science) were searched using the following search phrase: (breast cancer OR breast adenocarcinoma OR breast neoplasm OR breast tumour) AND (alcohol∗ OR alcohol intake OR alcohol consumption OR ethanol) AND (recurrence OR second primary). A narrative s..