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Inequalities in QLQ-C30 summary scores in patients that participated in clinical trials for each studied time point and SES indicator. Models are adjusted for age, comorbidities, breast cancer stage at diagnosis, type of lymph node management, surgery type, type of systemic treatment, and use of radiotherapy. Reported P values are for interaction by time points (P.int). QLQ-C30, QoL Core 30 questionnaire; SES, socioeconomic status; SII, slope index of inequality.
