Risk factors of breast cancer in Ramsar and Tonekabon

Breast cancer is the most common cancer and the leading cause of death in women between 40-45 years old. Recognition of highly significant risk factors of breast cancer is of vital importance in preventing the incidence of this type of malignancy. The objective of this study was to determine the risk factors of breast cancer. This was a descriptive-analytical case-control study. The study population consisted of patients with and without breast cancer living in two cities of Ramsar & Tonekabon who visited the hematology and oncology clinic during 2004-2007. A total of 120 individuals were selected based on pairs sampling method. The study tool was a researcher-designed questionnaire which could evaluate a number of variables. Data were analyzed using statistical tests including chi-square test, paired t-test, and logistic regression. There was a significant relationship between the breast cancer and the duration of breast feeding (p<0.02), family history of breast cancer (p<0.01), history of using oral contraceptive pill (p<0.000), condition of menopause (p<0.000), and history of abortion (p<0.001). Considering our data, periodic screening of women with one or more risk factors of breast cancer is recommended.