Prediabetes, diabetes, and risk of breast cancer: a case-control study.

Background And Aims: Although underlying mechanisms have been described to account for the association between prediabetes and diabetes with breast cancer, reported results have been inconsistent. We undertook this study to determine whether prediabetes and diabetes are risk factors for breast cancer in Mexican women with no family history of breast cancer in the mother, daughters, or sisters.

Methods: A case-control study was carried out during 2011-2013.