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Table 1 Patients characteristics according to mammographic density at diagnosis

From: Mammographic density is a potential predictive marker of pathological response after neoadjuvant chemotherapy in breast cancer

  

BI-RADSa a

BI-RADS b

BI-RADS c

BI-RADS d

Number of patients

 

16

120

140

26

Age

median (IQR)

59 (54–68)

59 (50–66)

49 (41–60)

44 (37–54)

BMI

median (IQR)

30 (27–35)

27 (24–30)

24 (22–27)

23 (21–26)

Number of pregnancies

0

1 (6.3)

9 (7.5)

25 (17.9)

3 (11.5)

1

 

21 (17.5)

22 (15.7)

3 (11.5)

2

6 (37.5)

34 (28.3)

51 (36.4)

10 (38.5)

3+

9 (56.3)

55 (45.8)

41 (29.3)

10 (38.5)

missing

 

1 (0.8)

1 (0.7)

 

Age at first birth

median (IQR)

24 (23–24)

26 (23–29)

29 (25–33)

29 (28–33)

Age at menarche

median (IQR)

13 (13–15)

13 (12–14)

13 (12–14)

12 (11–13)

Menopausal status

premenopausal

4 (25.0)

31 (25.8)

83 (59.3)

18 (69.2)

postmenopausal

12 (75.0)

89 (74.2)

57 (40.7)

8 (30.8)

Smoking

current

3 (18.8)

29 (24.2)

16 (11.4)

4 (15.4)

former

3 (18.8)

16 (13.3)

9 (6.4)

2 (7.7)

never

9 (56.3)

64 (53.3)

104 (74.3)

19 (73.1)

missing

1 (6.3)

11 (9.2)

11 (7.9)

1 (3.8)

Hormone replacement therapy

current

1 (6.3)

4 (3.3)

3 (2.1)

1 (3.8)

former

3 (18.8)

20 (16.7)

14 (10.0)

 

never

12 (75.0)

92 (76.7)

123 (87.9)

25 (96.2)

missing

 

4 (3.3)

  

Oral contraceptives

current

 

8 (6.7)

23 (16.4)

5 (19.2)

former

3 (18.8)

33 (27.5)

37 (26.4)

7 (26.9)

never

8 (50.0)

49 (40.8)

57 (40.7)

11 (42.3)

missing

5 (31.3)

30 (25.0)

23 (16.4)

3 (11.5)

  1. aThroughout the table BI-RADS breast composition is intended