Table 1.

Summary of breast cancer risk reduction categories considered.

Risk Factor	Evidence from National Cancer Institute (NCI) [21] Recommendations for Breast Cancer Prevention	Evidence from American Institute for Cancer Research Continuous Update Project Findings [8]	Number (#) of High-Quality a, Multilevel EBCCPs in a Population Facing Breast Cancer Disparities b/# of EBCCPs Meeting the Quality Criteria/# of NCI EBCCPs
Physical Activity	Decreases risk	Strong evidence of decreased pre and postmenopausal risk.	2/10/41
Higher Body Fatness in Young Adulthood	Not discussed	Probable evidence of decreased pre and postmenopausal risk.	1/4/16
Adult Body Fatness (marked by BMI, waist circumference, and waist-hip ratio) and Weight Gain in Adulthood	Increases risk	Strong evidence of increased postmenopausal breast cancer risk.	0/1/13
Alcohol	Increases risk	Strong evidence that alcohol increases pre and postmenopausal breast cancer, no strong evidence for other dietary factors.	0
Tobacco Exposure in Early Life	Not discussed	Not discussed in report.	0/13/16
Breastfeeding	Reduces risk	Probable evidence of decreased pre and postmenopausal risk.	0
Environmental Chemical Exposures	Not clear	Not discussed.	0

^a High-quality was defined as receiving an independent score of ≥3 for research integrity, intervention impact, and dissemination capability; and receiving an independent score of ≥50% for reach, effectiveness, adoption, and implementation. ^b Health disparities population defined as a multiracial/multiethnic population with ≤50% non-Hispanic White, a socioeconomically disadvantaged group, and/or a medically underserved or rural geographic area.