Table 2.

Association of hsa_circ_0045881 expression with clinical features of TNBC patients

Items	High (n = 13)	Low (n = 16)	χ2	P
Age (years old)			0.14	0.712
< 50	5	7
≥ 50	8	9
Tumor size (cm)			5.70	0.043*
< 2	9	6
≥ 2	4	10
TNM stage			6.33	0.015*
I-II	8	5
III	5	11
Ki67			8.62	0.003**
< 20%	10	4
≥ 20%	3	12
Lymphatic metastasis			5.98	0.029*
N0 − 1	7	5
N2 − 3	6	11
Survival			8.04	0.006**
Yes	12	12
No	1	4

*P < 0.05, **P < 0.01