title: Factors Associated with Mammographic Density in Postmenopausal Women.
abstract: OBJECTIVE
  Breast density increases the risk of breast cancer, but also in the interpretation of mammography is also important. This study examine the risk factors affecting breast density in postmenopausal women.
  
  
  METHODS
  Between January 2013 and January 2014, 215 patients admitted to The Clinics of Gynecology and Obstetrics with complaints of menopause were taken. According to the results of mammography, Group I (non-dense, n = 175) and Group II (dense, n = 40) were created. The informations of the caseswere analyzed retrospectively.
  
  
  RESULTS
  In Group I, body mass index (BMI), number of pregnancies, parity were significantly higher than group II (P < 0.05). In group II, the withdrawal period of menstruation and progesterone levels were significantly higher (P < 0.05). In logistic regression analysis, BMI for dense breasts and number of pregnancies were found to be an independent risk factor (P < 0.05).
  
  
  CONCLUSIONS
  Increased BMI, pregnancy and parity, result of reduction in density , but longer duration of menopause and increased progesterone cause an increase in density. BMI and the number of pregnancy was found to be independent risk factors for reducing breast density.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, Bozok University, Yozgat, Turkey.
authors.forename: Emel Kiyak
authors.initials: EK
authors.lastname: Caglayan
authors.affiliation: Department of Surgery, Faculty of Medicine, Bozok University, Yozgat, Turkey.
authors.forename: Kasim
authors.initials: K
authors.lastname: Caglayan
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, Yüzüncü Yıl Üniversity, Van, Turkey.
authors.forename: Ismet
authors.initials: I
authors.lastname: Alkis
authors.affiliation: Department of Surgery, Faculty of Medicine, Bozok University, Yozgat, Turkey.
authors.forename: Ergin
authors.initials: E
authors.lastname: Arslan
authors.affiliation: Department of Radiology, Faculty of Medicine, Bozok University, Yozgat, Turkey.
authors.forename: Aylin
authors.initials: A
authors.lastname: Okur
authors.affiliation: Department of Surgery, Faculty of Medicine, Bozok University, Yozgat, Turkey.
authors.forename: Oktay
authors.initials: O
authors.lastname: Banli
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, Bozok University, Yozgat, Turkey.
authors.forename: Yaprak
authors.initials: Y
authors.lastname: Engin-Ustün
keywords: Mammary glands human; Mammography; Postmenopause