Abstract
Background: Breast cancer is the number 2 cancer in Indonesia after cervical cancer. Breast cancer increases every year. The formation of breast cancer is stimulated by various factors such as obesity and a history of family planning. In breast cancer, there are three important receptors, namely estrogen (ER) receptors, progesterone receptors (PR), and HER-2/Neu. The purpose of this study was to determine the association of obesity and history of family planning with the estrogen hormone receptor (ER), progesterone hormone receptor (PR), and HER-2/Neu expression in breast cancer patients in the dr. Moewardi Hospital in Surakarta, Central Java. Subjects and Method: This was an analytic observational study carried out at Dr. Moewardi Hospital, Surakarta, Central Java. A sample of 117 pre- and post-menopausal women who performed examinations at the oncology surgical clinic at Dr. Moewardi hospital, Surakarta was selected by total sampling. The dependent variables were estrogen and progesterone receptors and HER-2/Neu expressions. The independent variables were obesity and history of contraceptive method. Data were obtained from the medical record and analyzed by multiple logistic regression. Results: Obesity (OR= 0.29; 95% CI= 0.13 to 0.68; p= 0.004) reduced estrogen hormone receptors and it was statistically significant. History of contraceptive method (OR= 1.18; 95% CI= 0.55 to 2.52; p= 0.680) increased estrogen hormone receptors but it was not statistically significant. Obesity (OR=0.41; 95% CI= 0.18 to 0.96; p= 0.040) and history of contraceptive method (OR= 0.41; 95% CI= 0.19 to 0.88; p= 0.022) reduced progesterone hormone receptors. Obesity and history of contraceptive method increased Her-2/Neu expression. Conclusion: Obesity reduces estrogen hormone receptors. History of the contraceptive method increases estrogen hormone receptors. Obesity and history of contraceptive method reduce progesterone hormone receptors. Obesity and history of contraceptive method increase Her-2/Neu expression. Keywords: Obesity, contraceptive method, estrogen, progesterone hormones, Her-2/neu Correspondence: Silvia Ari Agustina. Study Program in Midwifery, School of Health Sciences Achmad Yani, Yogyakarta. Jl. Ringroad Barat Ambarketawang, Gamping, Sleman, Yogyakarta. Phone: (0274) 4342000. Email: silvia_ari99@yahoo.com. Indonesian Journal of Medicine (2019), 4(3): 259-265 https://doi.org/10.26911/theijmed.2019.04.03.09
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