Breast lumps risk factors

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Risk Factors

Age (> 70 vs. < 35)	RR 17.0
Positive Family History	RR 2.6
Early Menarche (< 12 years old)	RR 1.5
Late Menopause (> 55 years old)	RR 2.0
HRT Use (current)	RR 1.2-1.4
OCP Use (ever)	RR 1.07-1.2
Postmenopausal Body Mass Index (> 30.7)	RR 1.6