Table 5 Characteristics of 143 breast cancers

Total number of cancers

143

100

96

0.610

Age (years)

46.6 (9.2)

47.8 (9.5)

46.5 (9.6)

0.096

Cancer type

 Ductal carcinoma in situ

35 (24.5)

31 (31.0)

23 (23.9)

0.038

 Invasive

108 (75.5)

69 (69.0)

73 (76.0)

0.038

SEER

 Localized

108 (75.5)

78 (78.0)

68 (70.8)

0.577

 Regional

31 (21.7)

20 (20.0)

26 (27.1)

0.284

 Distant

1 (0.7)

0 (0.0)

0 (0.0)

-

 Unknown

3 (2.1)

2 (2.0)

2 (2.1)

0.921

Treatment modality

 Surgery

129 (90.2)

90 (90.0)

84 (87.5)

0.199

 Chemotherapy

52 (36.4)

31 (31.0)

38 (39.6)

0.515

 Radiotherapy

38 (26.6)

24 (24.0)

21 (21.9)

0.049

 Hormone therapy

32 (22.4)

19 (19.0)

18 (18.8)

0.044

 No treatment

4 (2.8)

3 (3.0)

3 (3.1)

0.672

Time to cancer diagnosis since screening mammography (months)^*

2.46 (0.95–9.26)

1.54 (0.69–5.21)

1.54 (0.66–5.17)

< 0.001

Mammographic density

 Non-dense

18 (12.6)

14 (14.0)

14 (14.6)

0.164

 Dense

125 (87.4)

86 (86.0)

82 (85.4)

0.164

Mammography density

 Almost entirely fatty

2 (1.4)

1 (1.0)

1 (1.0)

0.455

 Scattered fibroglandular tissue

16 (11.2)

13 (13.0)

13 (13.5)

0.058

 Heterogeneously dense

66 (46.2)

50 (50.0)

42 (43.8)

0.663

 Extremely dense

59 (41.3)

36 (36.0)

40 (41.7)

0.198

Mammographic density-AI

 A

1 (0.7)

1 (1.0)

1 (1.0)

-

 B

23 (16.1)

19 (19.0)

17 (17.7)

0.082

 C

91 (63.6)

63 (63.0)

57 (59.4)

0.210

 D

28 (19.6)

17 (17.0)

32 (21.9)

0.876