| History | population | Frequency (%) |
| Age of the first menstruation(years) | ||
| - <12 | 23 | 52.3 |
| - ≥12 | 21 | 47.7 |
| - Total | 44 | 100 |
| Age of 1st childbirth (years) | ||
| - Never | 1 | 2.3 |
| - <30 | 41 | 93.2 |
| - ≥30 | 2 | 4.5 |
| - Total | 44 | 100 |
| Parity | ||
| - 0 | 1 | 2.4 |
| - 1 - 2 | 13 | 11.4 |
| - ≥3 | 30 | 68.2 |
| - Total | 44 | 100 |
| Breastfeeding mode | ||
| - Never | 5 | 11.4 |
| - Breastfeeding | 39 | 88.6 |
| - Total | 44 | 100 |
| Hormonal contraception | ||
| - No | 42 | 95.5 |
| - Yes | 2 | 4.5 |
| - Total | 44 | 100 |
| Hormonal status | ||
| - Menopaused | 16 | 36.4 |
| - Not menopausal | 28 | 63.6 |
| - Total | 44 | 100 |
| History of benign breast disease | ||
| - No | 42 | 95.5 |
| - Yes | 2 | 4.5 |
| - Total | 44 | 100 |
| Family history of breast cancer | ||
| - No | 41 | 93.2 |
| - Yes | 3 | 6.8 |
| - Total | 44 | 100 |