Design a preliminary research proposal to study the relationship between fruit and breast cancer & vegetable consumption.

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BACKGROUND

Breast cancer is the most widespread malignant tumor in women (30 % of all new cases of cancers). There are more than ten percent of women who are affected with breast cancer their lifetime. By the expert estimation there were almost 36,000 new cases of breast cancer diagnosed in 2000. Breast cancer also is the most common cause of cancer death in females, e.g. the age-standardised rate of mortality from breast cancer was 30.1 per 100,000 of population in 2002 (NS, 2004) Consequently all studies dedicated to the problem of the prevention and control of breast cancer have the highest importance and can be considered as one of the priorities of the national health care system. In the last decade there were determined following risk factors for breast cancer occurrence: family history of breast cancer, early menarche, personal history of breast cancer and previous abnormal breast biopsy, late menopause, race, age, the continuous use of the hormonal preparations, null parity, refuse of breast feeding, obesity etc. Nevertheless the role of dietary factors in breast cancer epidemiology is still unclear.