Calpain-1 Expression in Triple-Negative Breast Cancer: A Potential Prognostic Factor Independent of the Proliferative/Apoptotic Index

Table 1

Patient’s characteristics and association between calpain-1 protein expressions.

	N (%)
Females	55 (100)
Median age
<40 years	17 (30.9)
40–60 years	32 (58.2)
>60 years	6 (10.9)
Menstruation history
Premenopausal	34 (61.8)
Postmenopausal	21 (38.2)
Family history
No	45 (81.8)
Yes	6 (10.9)
Not available	4 (7.3)
BMI
Normal	15 (27.3)
>25–30	14 (25.5)
>30–35	15 (27.3)
>35	8 (14.5)
Missing	3 (5.4)
Breast side
Left breast	31 (56.4)
Right breast	24 (43.63)
Disease stage
Stage I	3 (5.5)
Stage II	24 (43.6)
Stage III	21 (38.2)
Stage IV	7 (12.7)
Pathological type
Infiltrative ductal carcinoma	53 (96.4)
Infiltrative lobular carcinoma	1 (1.8)
Micropapillary carcinoma	1 (1.8)
Ki67 staining
<20%	9 (16.3)
>20%	45 (81.8)
Missing	1 (1.8)
Calpain protein expression
Low	18 (32.7)
Intermediate	21 (38.2)
High	16 (29.6)

BMI: body mass index.