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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