Lifestyle Factors
Non-modifiable risk factors
- Age
- Family history of breast cancer
- Genetic predisposition
- Early menarche or late menopause
- Personal history of breast cancer
- Previous benign breast diseases
Modifiable risk factors
- No childbirth or first live birth after age 35
- No breastfeeding
- Use of hormonal replacement therapy
- History of receiving radiation therapy to the chest before age 30
- Being overweight or obese after menopause
- Alcohol consumption
- Physical inactivity
Probable risk factors
- Smoking
- Night shift work
- Stress
- Diet rich in meat / dairy products