Table of Contents
ISRN Oncology
Volume 2014 (2014), Article ID 159049, 6 pages
http://dx.doi.org/10.1155/2014/159049
Research Article

Association of Mammographic Breast Density with Dairy Product Consumption, Sun Exposure, and Daily Activity

1Surgery Department, Arash Women’s Hospital, Tehran University of Medical Sciences, Tehran, Iran
2Vali-e-Asr Reproductive Health Research Center, Tehran University of Medical Sciences, Tehran, Iran
3Radiology Department, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran
4Radiology Department, Arash Women’s Hospital, Tehran University of Medical Sciences, Tehran, Iran
5Research Development Center, Arash Women’s Hospital, Tehran University of Medical Sciences, Tehran, Iran

Received 12 December 2013; Accepted 22 January 2014; Published 4 March 2014

Academic Editors: G. Gatti and M. Loizidou

Copyright © 2014 Sadaf Alipour et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Mammographic density is a risk factor, for breast cancer and its association with various factors is under investigation; we carried out a study to assess its relationship with daily dairy intake, sun exposure, and physical activities. Patients and Methods. Women ≥40 years of age were interviewed about habits of dairy product consumption, daily sun exposure and physical activity. Exclusion criteria consisted of history of breast cancer, consumption of calcium and vitamin D supplements, hormone replacement therapy, or renal disease. Mammographic densities were classified according to the classification system of the American College of Radiologists into 4 classes. Results. Overall 703 cases were entered in the study. The mean age was years. The most common and least frequent classes of mammographic density were classes 2 and 4, respectively. There was no significant association between mammographic density and rate of dairy consumption, amount of sunlight exposure, and daily physical activity. Conclusion. Relation of sunlight exposure and intake of milk products with mammographic density need further study, while the subject of physical activity can be evaluated by a systematic review and meta-analysis of the existing literature.