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 |
Family history of breast cancer |
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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) |
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Breast cancer among degree relatives |
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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) |
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Exposure to irradiation |
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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) |
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