Overexpression of low-molecular-weight caldesmon is associated with aggressive phenotypes and epithelial-mesenchymal transition in breast cancer cells

Table 2 Breast cancer samples and their pathological characteristics, n = 51

Variables	n (%)
Age in years
< 40	9 (18.0)
> 40	42 (82.0)
Tumor stage
1	None
2	15 (29.4)
3	32 (62.7)
4	4 (7.8)
Molecular subtype
Luminal A (E2+/PR+) HER2-	36 (70.6)
Luminal B (E2+/PR+) HER2+	4 (8.0)
HER2-enriched	6 (12.0)
Triple-negative	5 (10.0)
Ki-67 index
≤ 50%	21 (41.0)
> 50%	30 (59.0)
Lymphovascular invasion
No	29 (57.0)
Yes	22 (43.0)
In situ component
No	28 (55.0)
Yes	23 (45.0)

ER: Estrogen receptor; PR: Progesterone receptor.