Table 2. The association between EXO1 expression and demographic and clinicopathological parameters of breast cancer patients.

Parameters	EXO1 expression		χ2	P value
	High (N=548)	Low (N=549)
Age, years (mean ± SD)	57.87±13.31	60.37±12.88		0.001709
Gender			0.76384	0.3821
Female	540	545
Male	8	4
Classification of breast cancer			7.751	0.1011
ER(+)PR(+)HER2(−)	191	214
ER(+)PR(+)HER2(+)	52	60
ER(−)PR(−)HER2(+)	22	19
ER(−)PR(−)HER2(−)	89	69
Other	210	171
Radiotherapy			0.81581	0.665
Yes	352	365
No	150	172
Unknown	30	28
Chemotherapy			5.7512	0.05638
Yes	303	280
No	297	211
Unknown	2	4
Pathologic stage			1.3907	0.2383
I/II	394	412
III/IV/V	149	131
OS status			/	/
Dead	90	63
Alive	458	486