Characteristics | Age group 22 - 34 years |
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| Age group 35 - 44 years |
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| Age group 45 years and over |
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| Overall series |
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| 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 |
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< 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) |
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Ménopause |
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<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) |
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Contraceptifs oraux |
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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) |
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≥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) |
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Hormone replacement therapy |
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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) |
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