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

Ménarche

< 12 years

6 (9.4)

19 (31.7)

0 .02

21 (18.8)

27 (25)

0.262

52 (23.2)

70 (30.2)

0.093

79 (19.8)

116 (29)

0.002

≥12 years

58 (90.6)

41 (68.3)

91 (81.3)

81 (75)

172 (76.8)

162 (69.8)

321 (80.3)

284 (71)

Ménopause

<55 years

0 (0)

0 (0)

3 (2.7)

28 (25.9)

133 (59.4)

132 (56.9)

<0.001

136 (34)

160 (40)

<0.001

≥55 years

0 (0)

0 (0)

0 (0)

0 (0)

24 (10.7)

96 (41.4)

24 (6)

96 (24)

Contraceptifs oraux

Never

32 (50)

44 (73.3)

0.017

28 (25.2)

32 (29.6)

0.142

36 (16.1)

25 (10.8)

<0.001

96 (24.1)

102 (25.5)

<0.0001

<6 month

30 (46.9)

14 (23.2)

70 (63.1)

55 (50.9)

150 (67)

130 (66.3)

250 (62.7)

199 (49.9)

≥6 month

2 (3.1)

2 (3.3)

14 (12.5)

21 (19.4)

38 (17)

76 (32.9)

54 (13.5)

99 (24.8)

Hormone replacement therapy

No

64 (100)

60 (100)

112 (100)

108 (100)

216 (96.4)

222 (95.7)

0.685

392 (98)

390 (19.75)

0.634

Yes

0 (0)

0 (0)

0 (0)

0 (0)

8 (3.6)

10 (4.3)

8 (2)

10 (2.5)