[Increasing social inequalities in quality of life after early breast cancer].

Using data from the French CANTO cohort (n=5,915), we assessed the socioeconomic inequalities in quality of life after breast cancer and their time trends over two years after diagnosis. Socioeconomic position was measured using self-reported financial difficulties. Quality of life was assessed with the QLQ-C30 summary score. Social inequalities were quantified using the slope index of inequality (SII). Social inequalities in QLQ-C30 summary score at baseline were observed after adjustment for age at diagnosis, Charlson Comorbidity Index, disease stage, and treatment. These inequalities significantly increased in year 1 and year 2 postdiagnosis.