Risk factors for breast cancer for women aged 40 to 49 years: a systematic review and meta-analysis.

ABSTRACT:

Background

Identifying risk factors for breast cancer specific to women in their 40s could inform screening decisions.

Purpose

To determine what factors increase risk for breast cancer in women aged 40 to 49 years and the magnitude of risk for each factor.

Data sources

MEDLINE (January 1996 to the second week of November 2011), Cochrane Central Register of Controlled Trials and Cochrane Database of Systematic Reviews (fourth quarter of 2011), Scopus, reference lists of published studies, and the Breast Cancer Surveillance Consortium.

Study selection

English-language studies and systematic reviews of risk factors for breast cancer in women aged 40 to 49 years. Additional inclusion criteria were applied for each risk factor.

Data extraction

Data on partici

SUBMITTER: Nelson HD 

PROVIDER: S-EPMC3561467 | biostudies-literature | 2012 May

REPOSITORIES: biostudies-literature