| Control patients | Breast cancer patients | p-value | |
Characteristics | n = 400 (%) | n = 400 (%) |
| |
Age group (mean ± SD years) | 45.51 ± 11.25 | 45.83 ± 11.05 | 0.685 | |
Age group (years) |
|
|
| |
22 - 34 | 64 (16) | 60 (15) | 0.843 | |
35 - 44 | 112 (28) | 108 (27) |
| |
45 and over | 224 (56) | 232 (58) |
| |
BMIb (Kg/m2) | 24.40 ± 3.22 | 28.35 ± 4.36 | <0.001 | |
Age at menarche (mean ± SD years) | 12.31 ± 1.39 | 11.98 ± 1.59 | 0.002 | |
Age at menopause (mean ± SD years) | 51.28 ± 2.74 | 50.22 ± 5.55 | 0.025 | |
Menaupausalstatus (%) |
|
|
| |
No | 240 (60) | 144 (36) | <0.001 | |
Yes | 160 (40) | 256 (64) |
| |
Number of children (mean ± SD years) | 3.97 ± 2.17 | 2.81 ± 2.20 | <0.001 | |
Contraception (%) |
|
|
| |
Never | 96 (24.1) | 102 (25.5) | <0.001 | |
Lessthan six month | 250 (62.7) | 199 (49.9) |
| |
Abovesix month | 54 (13.5) | 99 (24.8) |
| |
Type of contraception (%) |
|
|
| |
Hormonal | 100 | 100 |
| |
Barrier | 0 | 0 |
| |