Fig. 1.

Data sources. Each rectangle illustrates different Swedish registers which were cross-linked using an individually unique 10-digit personal identification number to generate the research database BCBaSe. Shaded area indicates the period of observation between 2005 and 2014 which the present study was based on. Patient Registers: diagnostic codes for inpatient and outpatient care. BC Quality Registry Regional Breast Cancer Clinical Quality Registers of the Uppsala/Örebro, Stockholm-Gotland and Northern regions of Sweden. LISA register Longitudinal integration database for health insurance and labour market studies. Prescribed Drug Register: details regarding filed drugs