Table I.

Expression of TGF-β1 in triple negative breast cancer.

Clinical features	TGF-β1 (high expression)	TGF-β1 (low expression)	χ2	P-value
Age, years			0.001	1.000
>50	20	18
<50	22	20
Menopausal			3.193	0.111
Non menopausal	20	25
Post-menopausal	22	13
Family history			0.956	0.416
Yes	2	4
No	40	34
Tumor size, cm			0.856	0.437
<2	14	9
2–5	20	21
>5	8	8
Lymph node			11.178	0.001
Positive	33	16
Negative	9	22
Histological grading			39.679	<0.0001
I–II	8	34
III	34	4

TGF-β1, transforming growth factor-β1.