| Variable |
Sporadic cases |
Historical controls Patients diagnosed in 2004 [12] |
p |
| Age at onset |
47 |
51 |
|
| Pathology stage |
|
|
|
Early (0, I, II)
Late (III, IV) |
53.5%
46.4% |
59.0%
45.9% |
0.36
0.80 |
| Histopathology |
|
|
|
| Infiltrating ductal carcinoma |
91.3% |
86.6% |
0.14 |
| Tumor grade |
|
|
|
| I and II |
40.0% |
54.5% |
0.01 |
|
