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Table 1 Baseline characteristics of BC patients and cancer-free controls

From: Cardiovascular disease in women with breast cancer – a nationwide cohort study

  BC patients Cancer-free controls
Stage ≤ III (diagnosed without distant metastasis)a Stage = IV (diagnosed with distant metastasis) Stage unknown Total
N = 12,715 N = 997 N = 2793 N = 16,505 N = 165,042
Age group
 < 45 11% 6% 7% 10% 10%
 45–54 21% 12% 16% 20% 20%
 55–64 31% 25% 23% 29% 29%
 65–74 21% 27% 19% 21% 21%
 75+ 15% 29% 35% 19% 19%
Region of residence
 Northern Jutland 10% 10% 10% 10% 10%
 Central Jutland 21% 22% 19% 20% 20%
 Southern Denmark 23% 19% 26% 23% 23%
 Capital 30% 29% 31% 30% 30%
 Zealand 16% 20% 15% 16% 16%
Education
 Low 38% 49% 37% 38% 38%
 Medium 39% 30% 32% 37% 37%
 High 19% 11% 14% 18% 18%
 Unknown 4% 10% 17% 6% 6%
Cancer treatment started within 9 months from BC diagnosis
 Surgery 96% 63% 81% 91% N.a.
 Chemotherapy 35% 37% 22% 33% N.a.
 Radiation therapy 62% 28% 34% 55% N.a.
 Antibody therapy 4% 7% 2% 4% N.a.
 Hormonal therapy 41% 38% 26% 39% N.a.
  1. aOf the 11,048 BC patients diagnosed in stage I-III in 2004–2007, 31% were diagnosed in stage I, 51% were diagnosed in stage II, and 18% were diagnosed in stage III. Available data did not allow classification of BC patients diagnosed in 2003 according to stage I, II and III