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The Investigation of Risk Factors Impacting Breast Cancer in Guilan Province

  • Joukar, Farahnaz (Social Determinants of Health Research Center (SDHRC), Guilan University of Medical Sciences) ;
  • Ahmadnia, Zahra (Social Determinants of Health Research Center (SDHRC), Guilan University of Medical Sciences) ;
  • Atrkar-Roushan, Zahra (Social Determinants of Health Research Center (SDHRC), Guilan University of Medical Sciences) ;
  • Hasavari, Farideh (Social Determinants of Health Research Center (SDHRC), Guilan University of Medical Sciences) ;
  • Rahimi, Abbas (Department of Radiotherapy, Guilan University of Medical Sciences)
  • Published : 2016.10.01

Abstract

Introduction: Breast cancer is multifactorial therefore more recognition of risk factors is important in its prevention. Objective: This study was conducted in order to determine the factors influencing breast cancer in women referred to health centers in Guilan province in 2015-2016. Method: In a case- control study, 225 women with breast cancer were investigated. The control group consisted of 225 healthy women of the relatives (third-rank) whose phone numbers were obtained from the patients. Data were collected through telephone interviews. Results: The risk of breast cancer raised in women who have a family history of other cancers (OR= 3.5; 95% CI= 1.96-6.6), exposure to X-Ray (OR= 2.5; 95% CI=1.1-5.5), having more than 4 children (OR= 2.695% CI=1.2-4.8), age more than 36 years at first pregnancy(OR=2.3; 95% CI=0.7-5.1),primary levelof education (OR= 5.4;95% CI=2.8-11.2) and inadequate intake of fruit (OR=1.5; 95% CI=1-2.2). Also, presence of the following factors reduced breast cancer risk: regular menstruation (OR= 0.66; CI=0.4-0.9), duration of breastfeeding more than 12 months, less than 6 months and 7-12 months (OR=0.23; 95% CI=0.09-0.59, OR=0.29; 95% CI=0.17-0.49 and OR=0.03; 95% CI=0.01-0.08) and parity (OR=0.4; 95% CI=0.27-0.83) In multiple linear regression analysis of higher education (OR=0.16; 95% CI=0.03-0.77), using contraceptives for more than 16 years (OR=2.3; 95% CI=1.4-3.9), family history of other cancers (OR=6.1; 95% CI=1.9-19.3) and a history of X-Ray exposure (OR=4.4; 95% CI=1.07-18.1) were considered as predictive factors. Conclusion: The results of this study emphasize the importance of informing women about breast cancer risk factors. So, identification of these risk factors is required as important means of prevention and treatment of breast cancer.

Keywords

Prevention;risk factors;breast cancer;case-control studies;Iran

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