Table 1. Correlation analysis between ClpP expression levels and clinicopathological characteristics of 990 BC patients in TCGA.

Characteristic	Number	ClpP expression		χ2	p-value
		Low (n = 495)	High (n = 495)
Age (years)				2.405	0.1209
<55	406	215	191
≥55	584	280	304
T Stage				10.4	0.0154*
Tx-1	261	145	116
T2	568	285	283
T3	126	48	78
T4	35	17	18
N Stage				2.431	0.488
N0	486	234	252
N1	330	168	162
N2	103	58	45
N3	71	35	36
M Stage				1.016	0.3134
Mx-0	974	489	485
M1	16	6	10
TNM Stage				2.276	0.517
x-I	191	100	91
II	560	276	284
III	224	114	110
IV	15	5	10
ER				5.765	0.0164*
Negative	232	100	132
Positive	758	395	363
PR				3.84	0.05
Negative	327	149	178
Positive	663	346	317
Her-2				0.1181	0.7311
Negative	828	412	416
Positive	162	83	79

Notes.

BC

breast cancer

TCGA

The Cancer Genome Atlas

ER

estrogen receptor

PR

progesterone receptor

Her-2

human epidermal growth factor receptor-2

^*p < 0.05 indicates statistical significance.