Worldwide, breast cancer comprises 22.9% of all cancers (excluding non-melanoma skin cancers) in women. The incidence of breast cancer is rising in every country of the world especially in developing countries such as India. In 1940, the lifetime risk of a woman developing breast cancer was 5%, or one in 20. The American Cancer Society estimates that risk being 13% in 2012, or more than one in 8. Studies have shown that certain factors, called risk factors, increase the likelihood that a woman will develop breast cancer. Many of these risk factors are not reversible, but some can be modified. A “risk factor” is anything that increases the risk of developing breast cancer. Many of the most important risk factors for breast cancer are beyond control (non-preventable), such as age, family history, and medical history. However, there are some risk factors that are preventable, such as weight, physical activity, and alcohol consumption.
Lakshmi R., Athira, R., Teena, J. M., and Vijayalakshmi, S., “Breast cancer risk factors: preventable and non-preventable”, IJPR, vol. 3, no. 10, pp. 1-5, 2012.