Table 3. Analysis of miR-155 expression and the clinicopathologic parameters of breast cancer patients.

Characteristics		No	Relative expression (x̄±s)	P
Age (year)	≤35	1	2.17±1.66	0.316
	﹥35	19	4.99±1.00
histological grade	I	2	1.35±0.87	0.314
	II	4	0.79±0.53
	III	14	2.81±1.99
Clinical stage	I	3	0.48±0.19	0.041
	II	10	1.67±1.17
	III	7	4.02±2.58
Molecular type	Luminal A	9	1.43±1.10	0.027
	Luminal B	4	2.12±0.58
	HER-2 (+)	6	3.26±1.29
	Triple negative	1	6.17±1.76
Ki-67	(+)	5	4.54±1.78	0.000
	(-)	15	1.57±0.81
P53	(+)	6	1.27±0.77	0.036
	(-)	14	2.76±1.78