Variables | Cases (n = 151) | Controls (n = 156) | P value | ||
---|---|---|---|---|---|
 | n | (%) | n | (%) |  |
Age at diagnosis | |||||
 Mean (years ± SD) | 43.81 ± 9.74 |  | 42.72 ± 9.29 |  | 0.316 |
  ≤ 40 | 56 | 37.09 | 72 | 46.15 | 0.107 |
  > 40 | 95 | 62.91 | 84 | 53.85 | |
Family history of breast cancer | |||||
 Sporadic | 91 | 60.3 |  |  |  |
 Familial | 60 | 39.7 |  |  |  |
Laterality | |||||
 Bilateral | 4 | 2.65 |  |  |  |
 Unilateral | 147 | 97.35 |  |  |  |
Histological type | |||||
 Ductal invasive | 130 | 86.1 |  |  |  |
 Lobular invasive | 16 | 10.6 |  |  |  |
 Others | 5 | 3.3 |  |  |  |
Histological grade | |||||
 I | 10 | 6.6 |  |  |  |
 II | 108 | 71.5 |  |  |  |
 III | 27 | 17.9 |  |  |  |
 unknown | 6 | 4 |  |  |  |
Tumor size | |||||
 T1 | 24 | 15.9 |  |  |  |
 T2 | 74 | 49 |  |  |  |
 T3 | 16 | 10.6 |  |  |  |
 T4 | 12 | 7.9 |  |  |  |
 TX | 8 | 5.3 |  |  |  |
 Unknown | 17 | 11.3 |  |  |  |
Lymph nodes status | |||||
 N0 | 48 | 31.8 |  |  |  |
 N+ | 92 | 60.9 |  |  |  |
 Unknown | 11 | 7.3 |  |  |  |
Metastasis status | |||||
 M0 | 127 | 84.1 |  |  |  |
 M+ | 19 | 12.6 |  |  |  |
 Unknown | 5 | 3.3 |  |  |  |
Her-2 status | |||||
 Positive | 26 | 17.2 |  |  |  |
 Negative | 113 | 74.8 |  |  |  |
 Unknown | 12 | 7.9 |  |  |  |
PR status | |||||
 Positive | 89 | 58.9 |  |  |  |
 Negative | 48 | 31.8 |  |  |  |
 Unknown | 14 | 9.3 |  |  |  |
ER status | |||||
 Positive | 107 | 70.9 |  |  |  |
 Negative | 36 | 23.8 |  |  |  |
 Unknown | 8 | 5.3 |  |  |  |
TN breast cancer | 22 | 14.6 | Â | Â | Â |