Characteristics

Age group 22 - 34 years

Age group 35 - 44 years

Age group 45 years and over

Overall series

Control patients

n = 64 (%)

Breast cancer patients

n = 60 (%)

p

Control patients

n = 112 (%)

Breast cancer patients

n = 108 (%)

p

Control patients

n = 224 (%)

Breast cancer patients

n = 232 (%)

p

Control patients

n = 400 (%)

Breast cancer patients

n = 400 (%)

p

Family history of breast cancer

No

64 (100)

56 (93.3)

0.036

111 (99.1)

102 (94.4)

0.049

214 (95.5)

185 (79.7)

<0.001

389 (97.3)

343 (85.8)

<0.001

yes

0 (0)

4 (6.7)

1 (0.9)

6 (5.6)

10 (4.5)

47 (20.3)

11 (2.8)

57 (14.3)

Breast cancer among degree relatives

First degree

0 (0)

4 (6.7)

0.036

0 (0)

4 (3.7)

0.098

3 (1.3)

38 (16.4)

<0.001

3 (0.8)

46 (11.5)

<0.001

Second degree

0 (0)

0 (0)

1 (0.9)

2 (1.9)

7 (3.1)

9 (3.9)

8 (2)

11 (2.8)

Exposure to irradiation

No

63 (98.4)

58 (96.7)

0.521

107 (95.5)

106 (98.1)

0.270

218 (97.3)

226 (97.4)

0.951

388 (97)

390 (97.5)

0.665

Yes

1 (1.6)

2 (3.3)

5 (4.5)

2 (1.9)

6 (2.7)

6 (2.7)

12 (3)

10 (2.5)