| Summary: | <strong>Introduction:</strong> breast cancer is the excessive growth of malignant cells in the breast tissue. In Cuba, this condition is the first cause of incidence and mortality among female sex malignant neoplasms. <strong><br />Objective:</strong> to determine the risk factors strength of association for breast cancer in the female population at Delicias health area, from 2011 to 2015. <br /><strong>Method:</strong> a case and control epidemiological study was carried out. A sample was taken by the simple random method, which was made up of 75 people (25 cases and 50 controls). The variables analyzed were: family history of breast cancer, late menopause, hormonal treatment, nulliparity, smoking, births in advanced age, precocious menarche, alcoholism, obesity, non-breastfeeding, and inadequate diet. Chi2, Odd Ratio (OR) and Pearson's linear correlation coefficient were calculated, the absolute risk and it was stratified by communities. Multiple logistic regression was applied. <br /><strong>Results:</strong> the greatest association strength risk factors were: births in advance age, smoking, hormone replacement therapy and late menopause. <br /><strong>Conclusions:</strong> it was demonstrated that risk factors for breast cancer which affect the territory in order of importance are: family history of breast cancer, late menopause, hormonal treatment, nulliparity, smoking, deliveries in advanced age, early menarche, alcoholism, obesity, non-breastfeeding, and inadequate diet.
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