Table 2 5-year breast cancer risk by the presence or absence of a microcalcification

Total women

3 910 815

58 315

23 267

0.60 (0.60–0.61)

No microcalcification

Total

3 900 637

57 791

22 965

0.60 (0.59–0.61)

 BI-RADS 1

1 236 398

10 548

3 983

0.33 (0.32–0.34)

 BI-RADS 2

1 156 867

15 303

5 999

0.53 (0.52–0.54)

 BI-RADS 3

1 038 262

20 338

8 212

0.80 (0.79–0.82)

 BI-RADS 4

469 110

11 602

4 771

1.03 (1.00–1.06)

Microcalcification

Total

10 178

524

302

3.01 (2.69–3.36)

 BI-RADS 1

1 703

51

28

1.69 (1.15–2.40)

 BI-RADS 2

2 821

118

71

2.56 (2.02–3.20)

 BI-RADS 3

3 851

228

133

3.50 (2.95–4.12)

 BI-RADS 4

1 803

127

70

3.93 (3.10–4.91)

Premenopausal women

No microcalcification

Total

1 611 923

31 268

12 429

0.78 (0.77–0.80)

 BI-RADS 1

239 116

2 850

1 053

0.45 (0.42–0.48)

 BI-RADS 2

399 866

6 031

2 373

0.60 (0.58–0.63)

 BI-RADS 3

613 791

12 985

5 174

0.85 (0.83–0.88)

 BI-RADS 4

359 150

9 402

3 829

1.08 (1.05–1.11)

Microcalcification

Total

4 755

299

162

3.45 (2.96–4.00)

 BI-RADS 1

402

22

12

3.04 (1.66–5.08)

 BI-RADS 2

914

35

19

2.11 (1.32–3.21)

 BI-RADS 3

2 101

143

80

3.86 (3.09–4.75)

 BI-RADS 4

1 338

99

51

3.85 (2.91–4.98)

Postmenopausal women

No microcalcification

Total

2 221 819

25 505

10 129

0.47 (0.46–0.48)

 BI-RADS 1

977 104

7 520

2 868

0.30 (0.29–0.31)

 BI-RADS 2

733 417

8 945

3 494

0.49 (0.47–0.50)

 BI-RADS 3

408 272

7 032

2 905

0.72 (0.70–0.75)

 BI-RADS 4

103 026

2 008

862

0.85 (0.80–0.91)

Microcalcification

Total

5 293

219

135

2.60 (2.19–3.06)

 BI-RADS 1

1 282

29

16

1.28 (0.77–2.04)

 BI-RADS 2

1 874

81

51

2.77 (2.09–3.60)

 BI-RADS 3

1 698

81

49

2.92 (2.19–3.80)

 BI-RADS 4

439

28

19

4.41 (2.75–6.65)