Impact of lifestyle factors on prognosis among breast cancer survivors in the USA.

Advances in diagnostic screening and adjuvant therapy have dramatically increased the number of breast cancer survivors in the USA, who may face changes in physical and mental health, social support, quality of life and economics. Women living with breast cancer are increasingly interested in lifestyle modification to decrease the risk of recurrence and mortality while increasing physical and emotional wellbeing. Although organizations such as the American Cancer Society support a healthy diet, frequent physical activity and stress reduction for decreasing breast cancer risk, studies examining the effects of lifestyle on clinical outcomes including survival and prognosis have been inconclusive. With the number of breast cancer survivors predicted to increase to 3.4 million by 2015, it is important to develop effective treatment paradigms that overcome barriers to behavioral modification to improve clinical outcomes and survivorship in breast cancer patients.