Aims, design and methods of a case-control study for the assessment of the role of dietary habits, eating behaviors and environmental factors, on the development of breast cancer.

In this work the aims, methodology and procedures of a case-control study that was developed for assessing the role of dietary habits, eating behaviors and environmental factors on the development of breast cancer, is presented. During 2010-2012, 250 consecutive women patients, newly diagnosed with breast cancer and 250 population-based, healthy subjects (controls) age-matched to the cases, were enrolled. Socio-demographic, dietary, psychological, lifestyle as well as environmental characteristics (i.e., exposure to pollution, pesticides, electromagnetic fields and radon) were recorded through face-to-face interviews with the participants. Dietary habits and eating behaviors were evaluated with a special questionnaire that had been developed for the study, and was found relatively valid and reliable.