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Table 1 Descriptive characteristics of breast cancer patients and their matched individuals (N = 622,204)

From: Disease trajectories and mortality among women diagnosed with breast cancer

  Breast cancer patients n = 57,501 Matched individuals n = 564,703
Cohort period 2001–2012 2001–2012
Age at diagnosis (years)
 Mean (SD) 60.1 (11.0) 60.0 (11.0)
 Min–max 20–80 20–80
Duration of follow-up (years)
 Median (IQR) 5.3 (5.5) 5.8 (5.5)
Total no. of person years at risk 320,742 3,340,912
  1. Abbreviations: SD standard deviation, IQR interquartile range. The Swedish national cohort of breast cancer patients includes women diagnosed with primary invasive breast cancer between 2001 and 2011. In this cohort, follow-up is complete until December 31, 2012. Individuals from the general population are matched on year of birth, county of residence, and socioeconomic status (obtained from the 1990 national census of Sweden, categorized as blue collar workers, white collar workers, self-employed workers, farmers, and others)