Table 2.
Distribution of breast cancer patient according to the risk factors suggested in the Gail model for breast cancer risk assessment
| Risk factors | Cases (n) | Controls (n) | Chi-square test | P | Degree of freedom |
|---|---|---|---|---|---|
| Age group | |||||
| ≤40 | 169 | 442 | 243.92 | <0.00001 | 3 |
| 41-50 | 220 | 130 | |||
| 51-60 | 156 | 46 | |||
| >60 | 105 | 32 | |||
| Age at menarche | |||||
| <12 | 24 | 15 | 2.97 | 0.226 | 2 |
| 12-13 | 124 | 139 | |||
| >13 | 502 | 496 | |||
| Age at first live birth | |||||
| ≤20 | 348 | 308 | 10.12 | 0.01 | 3 |
| 21-24 | 157 | 209 | |||
| 25-29 | 114 | 107 | |||
| ≥30 | 28 | 26 | |||
| Number of relatives with breast cancer | |||||
| 0 | 574 | 592 | 4.46 | 0.107 | 2 |
| 1 | 67 | 55 | |||
| >1 | 9 | 3 | |||
| Biopsies | |||||
| Yes | 578 | 604 | 6.3 | 0.012 | 1 |
| No | 72 | 46 | |||
| Atypical hyperplasia | |||||
| Yes | 4 | 2 | Yat’s corrected-0.17 | 0.682 | 1 |
| No | 646 | 648 |