Social class is an important and independent prognostic factor of XXXX mortality.

@entity1 @entity5 @entity0
Reasons of the important impact of socioeconomic status on @entity0 prognosis are far from established. This study aims to evaluate and explain the social disparities in @entity0 survival in the Swiss canton of Geneva, where healthcare costs and life expectancy are among the highest in the world. This population-based study included all 3,920 female residents of Geneva, who were diagnosed with invasive @entity0 before the age of 70 years between 1980 and 2000. @entity1 were divided into 4 socioeconomic groups, according to the @entity1 's last occupation. We used Cox multivariate regression analysis to identify reasons for the socioeconomic inequalities in @entity0 survival. Compared to @entity1 of high social class, those of low social class had an increased risk (unadjusted hazard ratio [HR] 2.4, 95% CI: 1.6-3.5) of dying as a result of @entity0 . These @entity1 were more often foreigners, less frequently had screen-detected @entity5 and were at more advanced stage at diagnosis. They less frequently underwent breast-conserving surgery, hormonal therapy, and chemotherapy, in particular, in case of axillary lymph node involvement. When adjusting for all these factors, @entity1 of low social class still had a significantly increased risk of dying of @entity0 (HR 1.8, 95% CI: 1.2-2.6). Overmortality linked to low SES is only partly explained by delayed diagnosis, unfavorable @entity5 characteristics and suboptimal treatments. Other factors, not measured in this study, also could play a role. While waiting for the outcome of other researches, we should consider socioeconomic status as an independent prognostic factor and provide intensified support and surveillance to @entity1 of low social class.
