Risk Factors for Breast Cancer in Gaza Strip, Palestine: a Case-Control Study.

Breast cancer (BC) is the main common cause of cancer mortality among women in the world. This study aims at investigating BC epidemiology and identifying the different risk factors associated and the most affecting ones among women in the Gaza Strip, Palestine. This study was a hospital-based case-control (1:2), as the study was carried out over the period of October 2014 to February 2015. A total of 105 BC patients, chosen from Al-Shifa Hospital in Gaza City and European hospital for the south governorate, were the case and compared to 209 women as a control group who matched the cases in age, residence, and with no history of breast problems. The age of the enrolled cases and controlled ranged between 18 to 60 years. The face-to-face interview was conducted during the patient visit to the oncology department and the control visit in their home. The result illustrated that women who had late pregnancy (> 35 years) (odds ratio [OR], 11.56; 95% confidence interval [CI], 1.64-81.35), or high body mass index (BMI; ≥ 30 kg/m) (OR, 4.70; 95% CI, 1.62-13.69), or first-degree family history of BC (OR, 2.7; 95% CI, 1.04-7.20), or hypertensive patients (OR, 12.13; 95% CI, 1.93-76.10), or diabetic (OR, 6.84; 95% CI, 1.77-26.36) were more likely to have increased BC risk. The findings of the present study suggest that positive family history of BC, high BMI, and some common diseases (hypertension, diabetes mellitus) may be the epigenetic factors promoting the occurrence of BC.