[INFLUENCE OF REPRODUCTIVE FACTORS, BREASTFEEDING AND OBESITY ON THE RISK OF BREAST CANCER IN MEXICAN XXXX ].

@entity1 @entity0 @entity5 @entity1144 @entity1017
UNASSIGNED: @entity0 ( @entity0 ) is considered a global public health problem, and is the most frequently type diagnosed in Mexican @entity1 . Therefore, it is important to study the risk factors associated to this @entity5 in order to establish prevention strategies. The aim of this study was to evaluate the effect of hormonal contraceptives and hormone therapy (HT) use and period of use, breastfeeding practice, @entity1144 and @entity1017 in adulthood, on the risk of @entity0 in adult @entity1 from Northwest Mexico. This was a case-control study that included 162 @entity1 (81 cases and 81 controls). A sociodemographic and health questionnaire, and a survey history of body weight were applied to @entity1 . Measurements of body weight, height and waist circumference were performed. To assess the association between @entity0 risk and exposing factors, a multivariate logistic regression model was used. Average age of cases and controls were 51.8    11.7 and 51.4    11.3 years, respectively. No significant association was found between the use and period of use of hormonal contraceptives and HT with the risk of @entity0 . The practice of breastfeeding (OR=0.34, 95%CI: 0.12- 0.92) and the time of exclusive breastfeeding (OR=0.64, 95%CI: 0.42-0.97; crude) were protective against the risk of @entity0 . @entity1144 (OR=0.93, 95%CI: 0.90-0.97) and @entity1017 in early adulthood (OR=0.90, 95%CI: 0.85-0.95) were inversely associated to the risk of @entity0 . In conclusion, the practice of breastfeeding may help prevent @entity0 in Mexican @entity1 .
