Breast Cancer and Precariousness: Influence of Socio-demographic Inequalities in Cancer Stage at Diagnosis, Treatment Management and Rehabilitation in the Ile de France Area

Precariousness is a multifactorial concept that can be broken down in the form of economic insecurity, and / or social insecurity and / or territorial insecurity. Precariousness has an impact on health that is difficult to assess precisely because it also impacts on other factors that may themselves influence health. Therefore, the understanding of the impact of precariousness on health involves studying individuals in their context.

Our study is designed to assess the impact of precariousness on the history of breast cancer, on care pathways, on treatment and rehabilitation in a multidisciplinary contextual analysis. Indeed, the socio -economic and geographical inequalities affect the history of breast cancer, treatment and its delay and post- treatment rehabilitation.

The main objective of this project is to compare the stage of disease at diagnosis (according to the TNM classification) in deprived and non deprived patients. The secondary objectives are to compare in the two groups - the socio-economic and geographical inequalities - the direct and indirect costs related to the management, the out-of pocket costs and to describe, based on individual inequalities identified, the pathway of care of the patient.

These objectives will be pursued in the framework of an observational cohort study, prospective, multicenter (Ile de France) comparative exposed / unexposed category. Each precarious patient will be matched to a non- precarious patient in the same age group, regardless of the center. The study will include any patient resident in Ile de France seeking treatment for breast cancer, regardless of the stage.