The unique risk factor profile of triple-negative breast cancer: a comprehensive meta-analysis.

Background: Triple-negative breast cancer (TNBC) has a poor prognosis compared with other breast cancer subtypes. This systematic review and meta-analysis examines whether known risk factors for breast cancer are also associated with TNBC in adult women.

Methods: EMBASE, Medline, SCOPUS, and gray literature were queried with no limit on the date or language of publication.