Table 1. Correlation between miR-874 expression and different clinicopathological features in breast cancer.

Variable	Cases (n)	Expression level of miR-874		P-value
		Low (n, %)	High (n, %)
Ages
< 60	590	291	299	0.603
≥ 60	499	254	245
ER
positive	842	435	407	0.049*
negative	247	110	137
PR
positive	737	368	369	0.913
negative	435	177	175
Lymph node
negative	504	252	252	0.001*
1∼3	386	179	207
4∼9	123	56	67
≥ 10	76	58	18
Distant metastasis
No	1066	531	535	0.294
Yes	23	14	9
Tumor sizes
< 2 cm	291	132	159	0.062
≥ 2 cm	798	13	385
TNM staging
I.II	819	392	427	0.012*
III IV	270	153	117

^*P < 0.05 calculated with Pearson chi² test.